Tag Archives: M4

Do You Want A Remarkable Two Stage Trigger For Your AR That Doesn’t Cost a Fortune?

I appreciate a good trigger – in firearms in general and definitely in ARs. To me, this usually means a two-stage trigger that doesn’t have a heavy pull and I can feel the second stage starting to engage with a relatively clean break. I can tolerate military heavy triggers (5-8 pounds usually with long pulls) but they are not my first choice and I really don’t like them in any form of rifle where I am trying to get a degree of precision.

I’ve tried many different triggers over the years and have typically gone in two directions – living with the stock trigger in the rifle / the trigger that came with the kit if it was for self-defense or I went with a Geissele SSA-E. That is an amazing trigger but is expensive even on sale.

I recently noticed that Palmetto State Armory (PSA) is now selling their own two-stage trigger and the reviews were very favorable so I ordered one in as an experiment to go in an AR DMR I was building using a mix of parts – the barrel was a 20″ model by Ballistic Advantage on an Aero Precision upper with a MI Combat rail handguard. I wanted a decent trigger for the rifle but really didn’t have the budget for a SSA-E but didn’t want to use a Mil-Spec-ish trigger either. Guess what I paid? $64.99 with free shipping!

The PSA 2-Stage AR Trigger

I’ve read in several places that Schmid is making the trigger for them. It has a Nickel Boron finish to enhance lubricity, the first stage breaks at 2.0lbs. The second is 2.5 pounds and the total comes in at 4.5 pounds. The trigger isn’t adjustable.

The trigger comes with everything you see – the trigger, hammer, disconnector, pins and springs.

Installation

The trigger installs just like any other AR trigger. The reference source I used to learn how to assemble AR lowers way back when is the guide on ar15.com and has a section on the trigger. A good installation video is from Brownells:

When you are done it will look something like this:

Comparisons

On top is an Aero Precision Mil-Spec fire control group. I’m using one of our AR trigger slave pins to pre-assemble the trigger, disconnector and the disconnector spring.

Okay, I had a couple of triggers that I could do pull tests on to give you some comparisons. Testing was done with a Wheeler trigger pull gauge that I really like.

This is my Wheeler Professional Digital Trigger Pull Gauge.

I created the following table by using the Wheeler gauge to do 10 test pulls of each trigger so you could see the average, minimum and maximum pull.

TriggerMinMaxAvg
Aero Mil-Spec6# 4.8oz7# 2.3oz6# 12.4oz
PSA EPT – Enhanced Polished
Trigger Group
6# 3.9oz6# 15.9oz6# 12.3oz
PSA 2-Stage Trigger4# 6.0oz4# 12.1oz4# 9.5oz
Minimum, Maximum and Average Trigger Pull in Pounds and Ounces Per Trigger

Conclusion

How did it feel? Well, there was a bit of pre-travel slack to pick up but then it broke pretty nicely. For $64, I was impressed! It’s kind of a no-brainer for me now that the next time I build a basic AR, I will use this trigger.

Maybe some day when I have time I’ll compare it to a Geiselle SSA-E side by side but for now, I’ll tell you that you can’t go wrong for the price. I actually ordered in another to replace the EPT trigger I have in another basic 16″ PSA AR that I have.

I hope this helps you out.


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.

If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at info@roninsgrips.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.


Computer Animation Video: This Does A Great Job Showing How Both An AR and M16 Operate

Folks, I always tell people you need to understand the basic mechanics of how your weapon operates. I’ve posted some slick videos in the past on how the AK-47, Dragunov. Glock pistol, AK-74, and AH-94 rifles operate [by the way, clicking on their names will take you to the blog post for each] and now I just found this one that very clearly illustrates how an AR-15, M16 and M4 operate. The author, Thomas Schwenke, goes through everything and explains both the semi-automatic and fully automatic mechanisms.

The video has some amazing detail such as this illustration of the M16’s full-auto fire control group.

One thing I like is that there is a narrator explaining what is going on plus they also label key parts – many animations just show the components without either a narrator or labeling.

So if you like AR rifles and pistols, you really need to watch this exceptional video. Kudos to the author for doing a seriously great job!

Here’s The Video


I hope you found it informative – I sure did.


If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at info@roninsgrips.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.


Please note the photo was extracted from the video and remains the property of its respective owner(s).


ATF Opinion Letter on AR Pistols – Some Key Considerations

In this ATF letter, the author asked the ATF’s opinion on a number of great AR pistol related questions.  I am paraphrasing a few points I found important to help folks doing full text searches for opinions:

1) An AR lower receiver is neither pistol nor rifle until it is built the first time.  If you want to make a pistol, a lower receiver must *never* have been built in a rifle configuration.

2) AR pistols do not have a barrel length restriction.

3) AR handguards can be used on an AR pistol

4) An AR rifle and pistol can be in the same household — note, and this is a personal comment, what got a guy in trouble years ago was that he had only an AR rifle and a pistol upper with no lower to mount it on.  I don’t remember all of the details but the main thing here is that you never want it to look like the only reason you have a pistol/SBR upper is to put in on your AR that is legally classified as a rifle.

5)  Magpul angled fore grips (AFGs) are permissible on the bottom accessory/picatinny rail.

AR_Pistol_1AR_Pistol_2AR_Pistol_3

 

I recommend people print and keep copies of letters just in case they need to show someone that some aspect of a weapon was “approved” by the ATF at some point.  Just bear in mind that ATF letters are not absolutes but it helps to have them handy if asked.  A state or local government may have their own more restrictive regulations as well so this may not mean AFGs are legal for everyone everywhere.

Legal Disclaimer:  I am not an attorney and am not giving legal advice.  I am just passing this information along and it is up to you to determine what you can/can’t do.

ATF letter stating that the Magpul AFG is legal for use on AR pistols

Please treat this as reference material only and not legal advice. The ATF does not always adhere to letters, states and local governments are doing their own thing and it’s hard to say what is acceptable or not just to be perfectly blunt. We live in interesting times unfortunately.

Folks, here is an ATF letter saying that an angled foregrip (AFG), such as Magpul’s models, can be used on an AR pistol.  This is the first time someone shared a definitive letter with me vs. hearsay.

12/14/2014 Update:  Here are scanned images of two different ATF letters saying AFGs can be used on AR pistols because they are not considered vertical grips:

atf-afg

This is a second letter wherein they answer a number of good questions about AR pistols in general.  On page three is another comment that the AFG is allowed:

AR_Pistol_1
AR_Pistol_2
AR_Pistol_3

The reason this matters is that a vertical foregrip is not legal without first registering the pistol as an “any other weapon” or AOW.  I recommend people print and keep copies of letters just in case they need to show someone that some aspect of a weapon was “approved” by the ATF at some point.  Just bear in mind that ATF letters are not absolutes but it helps to have them handy if asked.  A state or local government may have their own more restrictive regulations as well so this may not mean AFGs are legal for everyone everywhere.

Legal Disclaimer:  I am not an attorney and am not giving legal advice.  I am just passing this information along and it is up to you to determine what you can/can’t do.


If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at info@roninsgrips.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.


Sources For AR Parts

The following are all vendors of AR parts including barrels, handguards, triggers, magaziness and what have you that I use and recommend:

Beware no-name knock off websites selling generic import stuff. Some of the parts are counterfeit and not rated for firearms use.