1. Executive Summary

Knight’s Armament Company (KAC) operates as a specialized supplier within the global defense industrial base. The firm concentrates on the research, development, and manufacturing of small arms, signature reduction devices, and modular weapon accessories tailored for military and special operations applications¹. Founded in 1982 by C. Reed Knight Jr., the privately held, veteran-owned enterprise has established its market position by emphasizing engineered enhancements to the ArmaLite (AR) platform, a design philosophy influenced by a collaboration with the platform’s original designer, Eugene Stoner¹.

KAC functions as a research and development facility that subsequently scales its mechanical solutions into localized production¹. Operating out of a former missile manufacturing facility in Titusville, Florida, KAC controls the majority of its supply chain, prototyping, testing, and quality assurance processes internally⁴. KAC’s product ecosystem centers on the 7.62×51mm SR-25 and M110 Semi-Automatic Sniper Systems, the 5.56×45mm SR-15 and KS-series of assault carbines, and the Rail Adapter System (RAS) that standardized modularity for the United States military¹.

Over the past four decades, Knight’s Armament has secured procurement contracts from the United States Special Operations Command (USSOCOM), conventional U.S. military branches, and allied forces. This international footprint was expanded by the United Kingdom Ministry of Defence’s adoption of the KAC KS-1 as the L403A1 Alternative Individual Weapon for its specialized infantry units⁷. The company is aligning its manufacturing capabilities with modern combat requirements—specifically, signature reduction through 3D-printed Pressure Reduction Technology (PRT) suppressors and the integration of digital electro-optics—while navigating an expanding global small arms market projected to reach $11.1 billion by 2027¹¹.

2. Corporate History and Institutional Foundation

2.1. Early Years and the Focus on Signature Reduction (1974–1989)

The conceptual origins of Knight’s Armament trace back to 1974, when C. Reed Knight Jr.—a veteran with a background in the National Guard and professional experience in the police supply and firearms customization sector—established a modest enterprise in Vero Beach, Florida¹. The firm was formally incorporated and federally registered in 1982, operating as a sole proprietorship dedicated to addressing the specialized equipment requirements of military units¹.

During its formative years in the early 1980s, the company focused on signature reduction devices. At the time, military suppressors were often heavy and detrimental to weapon reliability. KAC secured its first major military contract in 1982, tasked with supplying sound suppression devices for M16 rifles to the Naval Surface Warfare Center at Crane¹. These early KAC suppressors were designed to replace older blast deflectors like the Mk 2, which offered minimal acoustic masking¹. By the mid-1980s, KAC expanded its material and acoustic expertise into pistol suppressors, including the development of integrated suppressor kits for the Beretta M9 pistol utilized in United States Air Force pilot survival packs¹. This focus on acoustic and visual signature management established KAC’s reputation within the special operations community as a provider capable of delivering bespoke engineering solutions.

2.2. The Eugene Stoner Collaboration (1990s)

Knight’s Armament’s trajectory shifted in 1990 when Eugene Stoner, the original inventor of the AR-10 and AR-15 platforms, joined the company¹. Stoner had initially designed the 7.62×51mm AR-10 in the late 1950s while at ArmaLite, utilizing a direct impingement gas operating system that reduced weight and aligned the recoil impulse with the shooter’s shoulder³. However, production challenges and the military’s subsequent shift toward lighter intermediate calibers (resulting in the 5.56mm M16) limited the original AR-10’s adoption¹³.

Collaborating with C. Reed Knight Jr., Stoner sought to revisit and modernize the AR-10 platform for contemporary semi-automatic sniper applications¹⁰. The objective was to blend the 7.62mm frame with refinements drawn from the AR-15/M16 lineage to achieve greater precision, parts availability, and modularity¹⁰. The result was the SR-25 (Stoner Rifle-25), a nomenclature that combined the “10” from AR-10 and the “15” from AR-15¹⁰. The SR-25 utilized over 60% parts commonality with the standard-issue M16, enhancing logistical sustainability¹. Furthermore, it introduced match-grade 24-inch barrels with 5R rifling and redesigned bolt carriers to handle the higher pressures of the 7.62mm NATO cartridge¹. This partnership defined KAC’s engineering philosophy: maximizing the potential of the Stoner gas system through metallurgy, geometry, and testing, rather than shifting to alternative piston-driven operating mechanisms.

2.3. Facility Expansion and the Institute for Military Technology

Following the expansion of military procurement after the events of September 11, 2001, KAC outgrew its original Vero Beach facility⁶. The company relocated its headquarters and manufacturing operations to Titusville, Florida, taking over a dormant McDonnell Douglas and Boeing Tomahawk missile factory⁵. This industrial site enabled KAC to integrate numerous testing and production environments under a single roof. The site features five dedicated firing ranges for product qualification, ranging from short-distance function testing to a 1,000-meter outdoor range for precision rifle validation⁷. The facility also includes indoor anechoic test cells for the scientific study of acoustic weapon signatures and explosive storage areas for ordnance testing⁸.

In 2009, Reed Knight formalized his private collection of firearms into the Institute for Military Technology (IMT), housed within the Titusville complex¹⁴. The IMT is a privately maintained research museum holding approximately 2,000 historical and prototype weapons¹⁰. The collection is divided into several sections, including the Hall of U.S. Arms, which traces American long guns from the flintlock era to the present, and a large collection of nineteen different Gatling guns¹⁵.

A central highlight of the IMT is the Eugene Stoner Memorial Gallery, which serves as a recreation of his office and displays over one hundred prototypes of his designs, including the rare Stoner 63 Survival Carbine¹⁵. Most of this collection was acquired from the former Colt Factory Collection¹⁵. While functioning as a historical repository, the IMT serves a practical role for KAC’s engineering staff. It provides a reference library of mechanical solutions, prototype failures, skeletonized cutaways, and chronological firearm evolution that informs current research, development, and troubleshooting at the company¹⁵.

3. Large-Frame Precision Platforms: The SR-25 and M110 Lineage

The SR-25 platform remains a historically significant large-frame semi-automatic rifle in modern military history, setting the baseline for western designated marksman and sniper roles. The platform’s development involved continuous cycles of military evaluation, combat deployment, and engineering refinement.

3.1. Origins of the SR-25 and the Mk 11 Mod 0

Funded initially by anticipated commercial sales, the SR-25 was introduced to the civilian market in 1992 as the Match Rifle variant¹⁰. This early civilian adoption, which saw over 3,000 commercial units sold, provided KAC with the capital and user feedback necessary to sustain the platform’s initial engineering and testing phases¹⁰.

Military adoption began in 2000. Following a five-year evaluation process focusing on the weapon’s effectiveness in urban combat environments, the U.S. Navy SEALs adopted the SR-25 under a sole-source contract for an initial 300 units¹⁰. The military designated the system the Mk 11 Mod 0 Sniper Weapon System¹⁰. The package was tailored for Special Operations Command (SOCOM) deployment, complete with a Leupold scope, backup iron sights, and a specialized KAC suppressor¹⁰.

3.2. M110 Semi-Automatic Sniper System Adoption and Combat Record

The operational deployment of the Mk 11 Mod 0 influenced the U.S. Army’s subsequent Semi-Automatic Sniper Rifle (XM110 SASR) competition. The military identified a capability gap: sniper teams and designated marksmen required a platform that could supplement, and in some urban roles replace, the slower-firing bolt-action M24 Sniper Weapon System⁹. The operational tempo in Iraq and Afghanistan demanded the capability to engage multiple targets in fluid environments¹⁷.

On September 28, 2005, Knight’s Armament won the competition, securing an initial contract valued at $16,561,656 for the development and production of the XM110 system¹⁶. Based on a modified SR-25 design, the rifle featured a 20-inch match-grade barrel with a 1:11 twist rate (optimized for 175-grain M118LR ammunition), ambidextrous controls, and the URX modular rail system¹⁶. Following operational testing at Fort Drum, New York, by Special Forces and the 10th Mountain Division, the system achieved type classification as the M110 in 2007⁷.

The first combat deployment of the system occurred in April 2007 with Task Force Fury at Forward Operating Base Salerno in Afghanistan¹⁸. By 2008, the U.S. Army recognized the M110 as one of the top ten inventions of 2007 for its impact on operational missions, noting that the semi-automatic capability allowed for faster target engagement and improved survivability⁷. The rifle demonstrated a 90% probability of functioning through 300 rounds without critical failure, establishing it as a reliable precision tool²⁰.

3.3. The CSASS Competition, H&K M110A1, and the M110A2 Evolution

Extensive combat experience in the Middle East revealed certain ergonomic and logistical limitations of the M110. Weighing over 13 pounds unloaded and measuring 46.5 inches with a suppressor attached, the M110 was deemed too long and heavy for optimal maneuverability during dismounted patrols and close-quarters urban combat¹⁹. The length of the M110 was 13 inches longer than an M4 carbine²¹.

In July 2012, the U.S. Army issued a Sources Sought Notice for the Compact Semi-Automatic Sniper System (CSASS) program⁸. The objective was to remanufacture or replace the M110 into a shorter, lighter configuration, targeting an overall length of 36 inches and an unloaded weight of 9 pounds, featuring a collapsible stock and removable flash suppressor²¹. On April 1, 2016, the Army awarded a contract with a maximum value of $44.5 million to Heckler & Koch (H&K) to replace the KAC M110⁹. H&K’s winning submission was a modified variant of the HK417/G28 platform, which utilizes a short-stroke gas piston derived from the G36⁷.

The Army designated the H&K weapon the M110A1 CSASS, despite it sharing no mechanical lineage with the KAC M110, likely to avoid initiating a new Program of Record²². The H&K M110A1 weighed 8.4 pounds unloaded and utilized an aluminum upper receiver to meet weight requirements⁸. While H&K was tasked with producing up to 3,643 CSASS rifles, the program’s focus subsequently merged with the Squad Designated Marksman Rifle (SDMR) initiative¹⁹. Ultimately, the vast majority of the approximately 6,000 M110A1 units delivered by H&K were fielded as SDMRs to conventional infantry squads, not as dedicated sniper systems¹⁹.

Because the M110A1 SDMR did not entirely fulfill the dedicated sniper requirement, the broader replacement of the original KAC M110 stalled²⁰. Consequently, the Army revised a $13 million contract in 2020 and 2022 to procure the KAC M110A2¹⁷. The KAC M110A2 retained the 20-inch barrel necessary to maximize the terminal ballistics of the 7.62mm cartridge at extended ranges, while modernizing the platform with an improved gas system, an adjustable stock, M-LOK rails, and a new flow-through suppressor⁷. Concurrently, the Marine Corps Special Operations Command (MARSOC) and other elements of USSOCOM pursued upgrades utilizing KAC’s M110K1 upper conversion kits to modernize their existing inventories²⁴.

4. Assault Carbines and Machine Guns: Enhancing the 5.56mm Platform

KAC’s 5.56×45mm NATO platforms—the civilian-market SR-15 and the select-fire military SR-16—are advanced iterations of the AR-15 architecture¹⁰. These rifles incorporate internal engineering changes designed to extend service life under heavy use.

4.1. The SR-15, SR-16, and Bolt Carrier Innovations (E3 and E3.2)

The primary point of mechanical failure in the standard AR-15/M4 direct impingement system under high-round-count schedules is the bolt. Specifically, the cam pin hole creates a weak point, and the locking lugs are prone to shearing¹. In the 2010s, Knight’s Armament addressed this vulnerability through the development of the proprietary E3 bolt design¹.

The E3 bolt features multi-lug geometry that increases the contact area with the barrel extension, distributing the stress of ignition¹. KAC engineered a reduced-diameter cam pin, which leaves more steel mass around the bolt body, reducing the likelihood of cracking¹⁵. The E3 bolt utilizes a proprietary “lobster-tail” extractor powered by dual springs, providing more reliable extraction leverage than standard single-spring Mil-Spec extractors²⁰. These modifications reduce bolt carrier speed, smooth the operating cycle, and extend the part’s service life¹.

Entering the 2020s, KAC introduced the E3.2 enhanced bolt, an iteration that built upon the original E3 by adding dual ejectors and rounding the bolt lugs¹⁰. This upgrade addressed ejection performance, a factor when utilizing suppressors on short-barreled carbines⁸. Suppressors increase the system’s gas blowback, inducing faster cyclic rates; the dual ejectors ensure spent casings are cleared even under over-gassed conditions²⁸.

4.2. Project Hunter and the KS-1 (L403A1) Adoption

The KS-Series (Knight’s Stoner) of carbines, unveiled in 2022, was designed specifically to meet international special operations forces requirements¹⁵. The KS-1 variant represents an evolutionary step over the SR-16.

Mechanically, the KS-1 features a 13.7-inch heavy-profile barrel that is cold hammer-forged from 32CrMoV12-10 steel and chrome-lined²³. The barrel utilizes ball-mill dimpling, a machining process that removes steel to reduce overall weight while increasing the surface area for rapid cooling, mitigating heat-induced barrel shift during sustained fire²⁹. The rifle utilizes a straight gas tube design and a proprietary mid-length gas system that minimizes pressure loss between the gas block and carrier key¹⁵.

In September 2023, the British Armed Forces officially selected the KS-1 under the Ministry of Defence’s “Project Hunter” to replace the SA80/L85A2-A3 bullpups and the Colt Canada L119A1-A2 rifles used by the Royal Marines Commandos and the Army Ranger Regiment (Army Special Operations Brigade)⁷. Designated as the L403A1 Alternative Individual Weapon (AIW), the KAC rifle won a two-year competition against platforms including Heckler & Koch’s HK416A5, SIG Sauer’s SPEAR-LT, Daniel Defense’s M4, and Glock’s GR-115F¹⁰.

The £90 million contract, facilitated by UK-based distributor Edgar Brothers, includes an initial £15 million order for 1,620 systems, with options to purchase up to 10,000 units over the next decade¹⁰. The L403A1 operates as a holistic system, integrating the KS-1 rifle with a Vortex 1-10x LPVO (Low Power Variable Optic), an Aimpoint ACRO P-2 red dot, KAC’s URX 6 M-LOK handguard, a Magpul CTR stock, and KAC’s QDC/MCQ-PRT suppressor¹⁸. Unloaded, the rifle weighs 6.88 pounds (3.12 kg) and measures 32.2 inches (81.8 cm) with the stock collapsed²³. When paired with its compact suppressor, the KS-1 achieves an overall footprint comparable to a 10.3-inch M4 carbine with a standard suppressor, but it delivers higher muzzle velocity (approximately 2,900 ft/s with M855A1 ammunition) and superior terminal ballistics due to its 13.7-inch barrel²⁹. Following its adoption, the Royal Marines conducted evaluations of the L403A1 during 2025 arctic training exercises, supplemented by joint US-UK testing²⁰. The KS-series has also seen adoption by South Korean units, including the 707th Special Mission Group and the Korea Coast Guard.

4.3. Light Assault Machine Gun (LAMG) and Sustained Fire

In 2017, the company introduced the Light Assault Machine Gun (LAMG), a 5.56mm belt-fed system¹. Weighing approximately 9 pounds unloaded, the LAMG is designed to provide controllable, fully automatic suppressive fire for dismounted assault teams without the bulk of traditional squad automatic weapons like the M249 SAW¹. Featuring a constant-recoil mechanism and a relatively low cyclic rate of 575–625 rounds per minute, the LAMG is optimized for interoperability with KAC suppressors, facilitating rapid barrel changes and reduced flash signatures¹.

5. Modularity, Accessory Systems, and Electro-Optics

Beyond firearms, KAC developed accessory mounting solutions and electro-optic integration, enabling the rifle to act as a modular sensor platform.

5.1. RIS, RAS, and the Picatinny Revolution

Building upon early industry standardization efforts in the 1980s by Richard “Dick” Swan of ARMS, KAC developed the Rail Interface System (RIS) and subsequently the Rail Adapter System (RAS) for the U.S. military’s M4 carbine and M16 rifles¹.

The RIS (the first-generation original SOPMOD Block I rail deployed circa 2000–2003) and the RAS (second-generation, clamped to the barrel nut) brought MIL-STD-1913 “Picatinny” rails to the fore-end of standard-issue weapons⁶. This capability allowed individual operators to quickly mount visual augmentation systems, infrared lasers (like the PEQ-15), vertical grips, and illumination tools without requiring armorers to modify the host weapon¹. KAC has supplied over one million RAS units to date¹.

5.2. Next-Generation URX Handguards and Knight Vision

As military requirements evolved toward lighter weight, KAC transitioned away from the heavy, quad-rail RAS designs. The company developed the URX (Upper Receiver Extending) series, transitioning to lighter, monolithic-style systems like the URX 3, URX 4, and the current URX 6⁸. The URX 6 is a free-floating M-LOK rail that provides versatile mounting points while offering structural rigidity, critical for retaining the zero of barrel-mounted infrared targeting lasers¹⁰.

Concurrently, KAC developed “Knight Vision,” a line of electro-optics. This includes the Universal Night Sight (UNS) family of image intensification and thermal devices⁵. These systems emphasize modularity, allowing operators to bridge day optics with night-vision capabilities via clip-on magnifiers, reducing the need for multiple discrete devices and enabling passive aiming solutions in high-threat environments².

6. Signature Reduction: The Suppressor Evolution

Knight’s Armament is a manufacturer of suppressor technology, addressing a requirement for modern infantry forces.

6.1. Legacy Systems and the QDSS-NT4

The QDSS-NT4 suppressor served as a standard 5.56mm silencer for the U.S. military, recognized for its ruggedness and its quick-detach mechanism over an A2-style birdcage flash hider¹⁷. However, traditional baffle-stack suppressors, like the NT4, possess mechanical drawbacks when paired with gas-operated rifles. They increase backpressure, driving toxic gas and carbon fouling back into the shooter’s face and the weapon’s receiver³³. This artificially increases the cyclic rate of the firearm, accelerating component wear and degrading overall reliability¹².

6.2. Pressure Reduction Technology (PRT) and Flow-Through Dynamics

To counter the effects of traditional baffles, KAC developed the QDC (Quick Detach Coupling) line, which was updated with Pressure Reduction Technology (PRT)¹². Engineered utilizing 3D-printed 718 Inconel—an aerospace-grade superalloy resistant to extreme heat and corrosive gases—PRT suppressors are categorized as “flow-through” designs¹².

The internal geometry of a PRT suppressor is engineered to vent expanding gases forward and out of the device prior to the weapon’s operating system beginning the extraction cycle¹². This technology maintains the bolt carrier velocity at near-unsuppressed levels, reducing mechanical stress on the bolt, reducing toxic gas blowback, and minimizing first-round muzzle flash²⁹. The QDC mounting method ensures minimal point-of-impact shift when attaching or detaching the device²⁹.

The current PRT lineup includes variants optimized for different mission sets:

Suppressor Model	Caliber	Weight (oz)	Length Added (in)	Overall Length (in)	Material	Acoustic Reduction
QDC/CRS-PRT	5.56mm	19.2	4.15	6.25	718 Inconel	~24 dB
QDC/MCQ-PRT	5.56mm	13.9	2.33	4.43	718 Inconel	~12 dB
M110-PRG	7.62mm	32.0	N/A	14.0	Steel/Alloy	~28 dB

Data sourced from product specifications¹². The CRS-PRT serves as the standard combat option, while the MCQ-PRT is an ultra-compact device designed to reduce concussive blast on short-barreled rifles in close-quarters¹².

7. Market Positioning, Buyer Base, and Industry Reputation

Knight’s Armament Company maintains a specific market positioning. With an estimated annual revenue of $65.3 million and approximately 318 employees, KAC operates on a smaller scale than mass conglomerates like FN Herstal, Lockheed Martin, or Sig Sauer²³. KAC balances domestic military contracts, international defense procurement, and a higher-tier civilian market.

7.1. Domestic Military and Federal Contracts

KAC is embedded within the U.S. Department of Defense (DoD) procurement ecosystem. According to federal award data, Charles Reed Knight Jr. (doing business as Knight’s Armament Company) has received over $94.6 million in visible federal contracts, predominantly categorized under NAICS 332994 (Small Arms, Ordnance, and Ordnance Accessories Manufacturing)². The Department of the Army accounts for roughly 95% of these federal awards, tied to the sustainment of the M110 program, suppressor acquisitions, and clip-on night vision devices¹³. The company’s ISO-9000 certification and status as a veteran-owned small business streamline its contracting pathways, often resulting in sole-source acquisitions².

7.2. International Defense Procurement

The adoption of the KS-1 (L403A1) by the United Kingdom signifies KAC’s capability in international defense markets. The £90 million Project Hunter contract reflects a shift in allied military strategy: equipping conventional, specialized infantry units with SOF-grade weapon systems rather than standard-issue assault rifles⁸. Securing this contract expands KAC’s footprint beyond the constraints of the U.S. military budget.

7.3. Commercial Market Economics and Brand Prestige

In the U.S. civilian and law enforcement market, KAC products are positioned in the upper tier of the pricing hierarchy. Rifles such as the 5.56mm SR-15 E3 Mod 2 consistently retail between $3,000 and $4,899, while complete SR-25 and M110 clones command prices ranging from $5,000 to over $6,000¹⁷.

KAC maintains strict production quotas, prioritizing military deliverables over civilian market saturation. This practical scarcity results in KAC firearms and accessories retaining secondary market value⁴. Civilians and law enforcement officers purchase KAC products based on their reliability, design, and the brand’s military lineage²⁵. Components, such as the KAC Triple Tap Compensator or authentic suppressors, frequently sell out upon retail release, demonstrating inelastic demand among firearms enthusiasts¹². The value of these rifles is often supported on the secondary market when paired with customizations, such as optical sights, tactical lights, and foregrips³.

7.4. Intellectual Property and Licensed Training Replicas

Extending its brand reach, KAC licenses its intellectual property to the airsoft and training weapons market. Manufacturers like G&G Armament, Classic Army, and EMG produce licensed 1:1 replicas of the SR-15, SR-25, and the Stoner LMG¹³. These electrically powered replicas (AEGs) are utilized both for civilian recreation and force-on-force training. While these replicas mimic the physical weight, ergonomics, and ambidextrous controls of the real firearms, they are subject to the quality control of the licensee (e.g., electronic trigger unit failures reported in G&G models)¹⁴. This licensing strategy solidifies KAC’s brand presence globally, acting as a marketing vector for the broader commercial enterprise.

8. Strategic Outlook and Future Trajectory

The global small arms market is projected to grow from $8.9 billion in 2022 to $11.1 billion by 2027, representing a compound annual growth rate (CAGR) of 4.5%¹¹. This expansion is driven by geopolitical tensions, territorial conflicts, and military modernization programs⁹. Knight’s Armament is positioned to address trends within this landscape.

First, the demand for signature reduction drives future infantry procurement. Militaries recognize that flash and acoustic signatures reveal an operator’s location and degrade the performance of image intensification devices (night vision)⁷. KAC’s development of 3D-printed, PRT flow-through suppressors aligns with the requirement to suppress infantry weapons across a brigade without degrading system reliability³³.

Second, military doctrine is shifting toward the integration of kinetic weapons and electro-optics. The U.S. Department of Defense’s “AI-first” agenda mandates that future weapon systems integrate with digital networks, AI compute, and advanced targeting algorithms³⁰. KAC’s proprietary “Knight Vision” line ensures the company remains relevant as the rifle transitions to a digital sensor node⁸. The ability to integrate optics, thermal sensors, and the rifle platform via URX handguards provides a systemic capability⁸.

Domestically, the U.S. Army is deploying the Next Generation Squad Weapon (NGSW) program, transitioning select units to the 6.8×51mm XM7 (SIG Sauer) to defeat advanced body armor. However, the 5.56mm and 7.62mm NATO cartridges will remain in service for decades across support roles, special operations, and allied nations¹⁰. KAC will remain a provider of traditional-caliber solutions for units that prioritize weight reduction, platform maturity, and reliability over adopting entirely new ballistic systems.

9. Conclusion

Knight’s Armament Company operates as a node of mechanical innovation within the defense industrial base. From its foundational work in acoustic suppression in the early 1980s to its partnership with Eugene Stoner, KAC has consistently pushed the engineering of the AR-10 and AR-15 platforms. The iterative development of the SR-25 and M110 lineage, alongside the selection of the KS-1 (L403A1) in the United Kingdom, reflects the company’s R&D-driven approach to small arms development.

By maintaining vertical integration over its manufacturing processes and prioritizing the demands of special operations forces, KAC has cultivated a reputation for quality, reliability, and precision. As infantry combat evolves toward integrated digital optics and mandatory signature reduction, Knight’s Armament is equipped to remain at the forefront of tactical firearms development, providing operators with the tools to maintain overmatch in complex threat environments.

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37. Knights Armament 556 QDC-CRS-PRT – Silencer Central, https://www.silencercentral.com/products/knights-armament-556-qdc-crs-prt
38. G&G x Knight’s Armament Company SR15 Airsoft AEG Rifle w/ M-LOK Handguard and G2 Gearbox (Model: SR15 E3 MOD2) | Evike.com, https://www.evike.com/products/94086/G-and-G-x-Knights-Armament-SR15-Airsoft-AEG-Rifle-w-M-LOK-Handguard-and-G2-Gearbox-Model-SR15-E3-MOD2/reviews/