AR-15 CompMag. GEN 3

(12 Reviews)
Current Stock:


The AR-15 CompMag.  GEN.3 

CA. Compliant. 

N.Y. Compliant with the simple addition of epoxy over the lock cover.

Lifetime Warranty. If something ever breaks, we will replace it.

10 Round capacity. 

Newest Version.  GEN.3 (updated February 15, 2021)

Instantly locks into your firearm. The CompMag can be easily removed by breaking your action, removing the lock cover on the magazine, and pushing out the mag with the release tool. The release tool is included with your CompMag.

The GEN.3 CompMag automatically locks into your firearm once it is inserted.

Our unique fixed magazine design creates an ammunition feeding device designed to be contained in or permanently attached to a firearm in such a manner that it cannot be removed without disassembly of the firearm action.

Allows you to keep the AR-15 features you love on your rifle. (pistol grip, forward grip, retractable stock, and flash hider).

No need to "break your action" or deviate from the normal operation of your firearm to reload.  

Loads easier than a standard magazine. No heavy spring to push each round against.

Will fully load on a closed or open bolt.

Instant installation.  No holes to drill. No need to modify your firearm.

Very easy to remove, should you decide to shoot outside of California.

Ultra durable and heavy duty, built to last. 150% to 300% thicker side walls than most polymer magazines.

17-7 Stainless steel magazine spring.

CNC turned steel charging handle with glossy black oxide finish.

Round counter indicates exactly how many rounds are left in your firearm, including what's in your chamber.

Holds the bolt open after the last round is fired.

Allows for easy clearing of type 3 malfunctions (such as double feeds).

Can be used in California and other restrictive firearm states. Check your local and state laws before ordering.



Patented Innovation. (CompMag has 7 patents at this time.)

Designed and Made In the U.S.A.   Right here in California.



It does not, by itself, make your firearm New York Compliant. For N.Y. compliance you must either epoxy the release hole cover once the CompMag is installed, or use another N.Y. locking device. For information on New York Compliance please read "Is the CompMag N.Y. Safe act compliant" at AR-15 CompMag Information.

In New York, often times a MAG-LOCK is installed on the firearm, which disables the mag release. The CompMag can be squeezed by the mag-lock device if it is installed too tightly, and will result in the rounds or the follower not moving through the CompMag properly causing misfeeds. Always check the mag function before using epoxy on the mag-lock.



Compatible with .223, 5.56, .300ACC Blackout, and .277 Wolverine Ammunition.

Compatible with standard AR-15 type lowers. (M4, M16, AR15).

For receivers with Cerakoted magwells we recommend  roughing up or removing the Cerakote inside the magwell where the locking wheel sits when the CompMag is inserted. You can easily do this with a bit of sandpaper. Cerakote is a slick, hard surface and will prevent the locking wheel from engaging so it must be removed for the mag to lock in properly.

Compatible with other firearms that accept a STANAG (AR-15) magazine and have a removable upper receiver; including the SCAR16, CZ Bren 2 (5.56), Bushmaster ACR, SIG MCX, SIG 556, Galil ACE, BRN180M, Springfield Saint Edge ATC, and Daewoo DR200.

NOT compatible with lowers that have a custom or extended magazine well (such as Seekins SP225, Sharps Bros, HKMR, and Spike's Jack).

Not compatible in bullpup firearms such as the Tavor as you cannot separate the receiver to remove the CompMag.

NOT compatible with top loaders such as the MA loader or the Bear Flag Defense loader.



Before using, please read the instructions and watch the videos found in the recent posts section on our home page, entitled "Loading and Unloading your CompMag. Clearing Double Feeds.". This will help you better understand how the CompMag operates.   

Thank you.


 As we, and our Attorneys, understand it, this product falls within the laws as written. At this point it has not been endorsed or approved by any law enforcement agency or regulatory body within the United States, due to their reluctance to endorse any compliance products. Once contacted, the D.O.J. told us that they would not endorse any compliance products and that we should seek the advice of a qualified firearms attorney.

We then had our firearms attorneys research the topic of California compliance thoroughly and their professional opinion is that the CompMag would be deemed a fixed magazine in accordance with California Law. Letters from them can be found on our home page under "Recent Posts".

Even though we have had our Firearms Attorneys approve this product as a fixed magazine according to California law, your situation may be different. For example, putting a CompMag on a banned AR-15 or a short barreled rifle (SBR) will not make it compliant. Know your local/state laws and regulations prior to purchasing this product. If you are unsure whether or not you have an assault weapon, please contact a firearms attorney.

CompMag LLC. is not held responsible for injury or damage from inaccurate assembly, misuse, illegal use or modification of this device, nor are we held responsible for your understanding or interpretation of the laws and regulations that may apply.

Thank you.


Reviews (12)

AR-15 Gen3

Written by Mike R. on Mar 19th 2023

Solidly built, As described. I'd buy another.

Best Solution Ever for CAlifornia

Written by Paul on Jan 5th 2023

I used to be a "featureless" guy. But I am sick of stupid uncomfortable grips and fixed stocks and dubious muzzle devices. I want fully featured rifles. I do not want to compromise. And Compmag is the answer. This is what I want from my "fixed mag" solution: 1 - I want to be 100% legal for storage and transport. I want to comply with the law, not just the letter, but the intent and spirit of the law. Not only do I want every cop or DA who handles it to immediately know that it is legal, I want them to be unable to even figure out how to remove the magazine. 2 - I want minimal or better yet no modification of the rifle. 3 - I want it to be easy and fast to convert back to a normal rifle (for SHTF or out-of-state use etc). 4 - I want it to be possible and reasonably easy to actually use the rifle with the thing on. Compmag is all of these things. It is hands down the best way to go in Commiefornia.

Comp mag 3gen

Written by Charles Green on Oct 4th 2022

Thought the previous invention was good but they still made a great improvement. Thank you

Best ca compliance option on the market

Written by Jeff Cicero on Jun 16th 2022

I have tried various options for ca compliance. I have tried the hell fighter, different fin grips, featureless etc. Once I found the compmag, I ditched all my other options and went head first into compmag. It is the best option for fixed mag compliance which allows me to clear jams, operate the rifle as intended, and not alter my rifle. When I leave the state all I have to do is switch my mag and I have a standard AR. I have spoken with the owner of the company and he was very helpful and stands behind his product. I have referred ALL my friends and anyone who asks to Compmag. IT is my ONLY solution.

Comp Mag AR15

Written by MD Arms on Jun 11th 2022

Great product. Installed in place of pinned 10 round magazine. No issues to date, performance has been consistent and without jamming.

Product review

Written by MD Arms on Jun 6th 2022

Great product for CA and NY firearm owners.

Gen 3 ar mag

Written by Farid on May 18th 2022

So far so good. I like the new design with the pin hole to release it. Now i dont have to look for a flathead to unscrew it. I have both gen 2 and 3 and both are running well with no issues. Put about a couple hundred rounds so far. I would get more for sure

compmag 3

Written by samuel on May 16th 2022

good product. not yet ran it too much. much better then the previous mags.

COmpmag Ar15 gen 3

Written by Dan on May 8th 2022

So far so good. Haven’t got a chance to test fire but it installed very easily. Looking forward to some range time.

Awesome improvements

Written by Cooper on Apr 28th 2022

Gen 3 is amazing! Fits perfect! Thicker plastic. BEST one yet! Hands down the best option for states with restrictions! Highly recommended!!

Gen. 3 comp mag

Written by Aaron scott Demorest on Mar 25th 2022

Huge improvement from the gen. 2 compmag!!!! I used my gen.2 once, and had a lot of issues with it. Spent a lot of time trying to adjust it to get it to cycle properly and could never get it quite right. But the gen.3 was excellent. Plug and play!! Wish the gen.3 was out before I wasted my money on the gen.2!!!

COMPMAG Gen 3 for AR-15

Written by Ron J on Mar 1st 2022

This is the best 'fixed magazine' solution for anyone in California that owns an AR-15, period. Very easy to install, remove and use. I applaud whoever engineered this item, they did a great job. Very user-friendly, and not complicated in how it functions compared to some other products out there. I recommend this product 100%.

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