The Stribog 10mm Is Amazing!

Back in 2022, I bought a Stribog SP9A1 and really liked it. Then the ATF brace fiasco rolled around and I decided to sell it. It was a darned nice 9mm pistol caliber carbine (PCC) with the brace and I have since regretted selling it. Once the brace ruling was shot down, it went back on my “I need to get another one some day list”. Before I decided to buy te SP9A3, Grand Power decided to release a 10mm version – the SP10A3. Two weeks later I had one.

Why did I jump on the 10mm? In general, I like to let new designs settle down and get the bugs worked out. In this case, Grand Power was taking a very proven design and upscaling it. The second reason is that 10mm is God’s Pistol Cartridge in my mind. Sure, the 9mm has thousands of loads and can do the job but 10mm was designed by Colonel Cooper to fill a gap he saw for pistols reaching out to 50 yards. It was souped up from the get go.

At any rate, I have a number of 10mm pistols right now, have always liked the 10mm round including for back woods bear defense. I wasn’t adding a caliber but extending the situations wherein I could use it. I’m honestly not accurate with a pistol beyond 25 yards due to my tremor and have wanted a 10mm pistol caliber carbine (PCC) for quite some time. I have always been far more accurate with a carbine than a rifle. The problem has always been a lack of affordable 10mm PCC options on the market. So, when I read the first blog post about a 10mm Stribog being released, I moved fast.

The Stribog SP10A3 showed up in a very nice hardcase with three of it’s magazines. It was time to get creative.

Making the Mods

I knew the base Stribog SP10A3 would be too heavy for me to shoot as a pistol so I started researching what all I was going to do in terms of the brace, compensator, optic and handstop.

The Brace

For the brace, my first choice was the F5 modular brace but they were sold out because they really hadn’t kicked back into gear after the brace ruling was repealed. I knew I wanted a folder so I went with an A3 Tactical Modular Folding Brace – which has adapter, folder and aluminum struts. For the actual brace portion, I like the aluminum Tailhook Mod 1 braces – they have great machining and don’t flex at all. I also opted for a Xeno cheekpiece that attaches to the strut.

By the way, the SP10A3 can use the same braces as the SP9A1 and SP9A3 series weapons. It comes with a polymer rear cap that has an integral 1913 Picatinny rail on it so you can use one of the many options out there – notably the various options from JMAC Customs that pioneered the concept.

This is the A3 modular brace comprised of the Stribog adapter, folding mechanism, straight aluminum strut and a Mod 1 Tailhook brace. Note, The SP10A3 uses the same braces as the SP9A1 and A3.

This is a close up of the Tailhook Mod 1 brace. You push a button on the other side and it opens up to provide support under your arm for more stable one-handed shooting.

The Compensator

Now this part might have been overkill. The Stribog SP10A3 is a chunky boy but not in a bad way. I expected it to manage the 10mm cartridge’s recoil just fine all on its own but it had a 9/16-24 threaded barrel that needed something stuck on it! Take that thread size and a 10mm/.40 S&W caliber and you enter the land of limited choices. Hint – search for the .40 and you’ll get more results.

First, I detest aluminum muzzle brakes. When you shoot a lot, the erode quickly due to the heat and particles of the muzzle blast. I’ve also seen aluminum brakes and fake cans droop/sag when the aluminum gets so hot it starts to melt. So, I wanted steel.

After some digging, I went with an HK Parts Micro Comp. It’s ordnance grade steel, nitride finished, very small and they have two models – one with slotted ports and one with numerous circular port holes. I went with the latter just because I’ve used the circular port style in the past with good luck.

That huge green chunk of rubber is the recoil buffer of the Stribog SP10A3. As I wrote this, I was trying to think of all the SciFi movies that had some substance made up of this green color. Well, I’ll let you ponder that but I can tell you it does the job of soaking uip some of the remaining recoil remarkably well.

This is the HK Parts Micro Comp – 9/16-24 for .40 caliber.

The Optic and BUIS

I wanted a fast optic sight for target acquisition within 100 yards. The Vortex AMG UH-1 is a perfect fit for this situation. Being a holographic sight, it is parallax free, has unlimited eye relief and appears to the eye as being on the same plane as the target. Moreover, the laser projected EBR-CQB reticle has a one minute of angle (MOA) red dot surrounded by a 65 MOA target acquisition ring.

People ask me why I am so pro-Vortex and the reasoning is simple – the optics have excellent engineering, work as claimed, are very durable and are backed up by a no-hassle warranty. To save money, I could have opted for the Vortex Crossfire red dot but the UH-1 is such a step up with its bigger window and reticle that I went with it.

By the way, unless a weapon will only be used at ranges, always factor in backup iron sights (BUIS). In the case of pairing BUIS with the UH-1, I used Magpul Pro Sights. The Pro series sights are made from steel vs. their polymer counterparts and I have slowly drifted towards them over the years because I find them robust and reliable.

Here is the Vortex AMG UH-1 optic and the front and rear Magpul Pro Sights. I tend to run the BUIS folded down until I need them. They are in the deployed/up position right now for the photo.

The Handdguard and Handstop

One design difference that I appreciate is that the SP10A3 has a long handguard right out of the box. With the SP9 series you either had a lot of barrel exposed or you added something like the Dragon Snout. So, no changes there.

The one thing I did add was an Arisaka HS-P hand stop. Call me paranoid but I want something at the end of the handguard that stops my hand from sliding off the end. The Arisaka is a simple rugged hand stop that has a really novel way of locking itself onto your Picatinny rail vs. unsightly exposed screws.

You slide the HS-P on your rail to the location you want. You then use a hex head wrench to deploy the silver lug shown above between the elevated Picatinny segments and it locks in place. It’s such an elegant design and rock solid.

Here is a photo of the Arisaka HS-P in position. It works great and feels great — I seriously like this little hand stop!

I Haven’t Changed The Trigger Yet

One thing I did notice was the trigger. The SP9A1 Stribog I owned had a surprisingly good trigger. What was in my SP10A3 was a “meh” trigger. Not great but not horrible either. Guess what? It turns out it is an AR fire control group. You can go to whatever AR trigger you want although I am doubtful cartridge triggers will work. I may change it out for a Geiselle in the future or even just polish it but left it alone for now.

I was surprised to find out from Grand Power USA that the Stribog SP10A3 uses an AR fire control group. I never asked about my SP9A1 because it was remarkably decent straight from the factory. Looking at the finish on the hammer, it could use some polishing or just to get worn in — in other words, shoot it a bunch, let the parts get to know each other ane a lot of the roughness will smooth itself out as imperfections get worn down.

End Result

The Stribog turned out slick. The only thing I have ditched so far is the quick disconnect sling swivel you see just above the pitol grip. While it seemed like a great idea, it annoyingly interefered with the web of my hand between my thumb and index finger.

Summary

I was genuinely excited. The SP9A1 I had impressed me so much that I ordered this SP10A3, planned and installed some modifications. Next up was to take it to the range and just to spoil the next post a bit – it ran stunningly well with S&B 180gr 10mm FMJ ammo.

Note, I have to buy all of my parts – nothing here was paid for by sponsors, etc. I do make a small amount if you click on an ad and buy something but that is it. You’re getting my real opinion on stuff.

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