AR-15 - F.N.G.R. Fixed Magazine Kit

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(5 reviews) Write a Review


With MagLatch F.N.G.R. installed your firearm may no longer be deemed an "assault weapon" by restrictive states. Our kit installs as easy as the mil-spec magazine release because it is exactly that. We've taken mil-spec parts and modified them rather then redesigning a nearly perfect platform. That means no funny arms, milling, or drilling your lower. Our compliant device may convert your firearm bypassing assault weapon registration requirements. When used properly the F.N.G.R. conforms to all requirements of SB 880/AB 1135 and NY Safe Act. Most restrictive states follow the same requirements but be sure to check with your local authority before installing our device.

Use of a M3 PMAG 10 round magazine is recommended in conjunction of our fixed magazine device.

Most mil-spec forged AR-15 style firearms will utilize a Type 0 shim.

Most billet AR-15 lowers will utilize a Type 1 shim.

Regardless of type, fitting of the F.N.G.R. shim may be required due to variations to the recess of the magazine well.

Since inception of the F.N.G.R. we've compiled a list of variances that use our other shims:

TYPE 0 (.475 - Mil-spec forged) TYPE 1 (.400 - Billet) TYPE 2 (.600 Billet)


  • Aero Precision X15 and M4E1
  • Anderson AM-15
  • ATI AR-15
  • Bravo Company Machine (BCM)
  • Colt M4, EPR, etc.
  • Daniel Defense DDM4
  • Diamondback DB-15
  • FNH FN15
  • K&M Arms M17S (5.56)
  • Palmetto State Armory PA-15
  • Ruger AR-556
  • Sig Sauer M400
  • Smith & Wesson M&P 15
  • Springfield Saint (5.56)
  • Stag Arms STAG-15
  • Wilson Combat
  • 2A Armament
  • LaRue Tactical
Noreen BBN-223


IN A BAN STATE: Insert magazine of 10 rounds or less. Insert F.N.G.R. shim.

IN A FREE STATE: Disassemble Upper and lower. Remove F.N.G.R. shim. Use rifle as intended where legal to do so.


While in ban states a ejection port loader such as the Bear Flag Defense BF-10 is recommended for fastest reloads. When traveling to free states disassemble the action and remove the F.N.G.R. shim from the lower receiver.

Kit includes:

  • MagLatch Modified Magazine Catch
  • F.N.G.R. (2)
  • Magazine Catch Spring
  • Magazine Release Button
  • Set Screw
  • Allen Key
  • Installation Instructions

Don't forget your backup F.N.G.R.'s!

After overwhelming requests to solve the ever growing problem of forgotten magazines, Andrew Bobro of Bobro Engineering, designed the F.N.G.R. to prevent misplacement of your magazine. F.N.G.R. was originally designed to retain your firearm's magazine in the confines of your lower receiver to prevent loss or theft.

Patent Pending

MagLatch devices have not been approved by the DOJ. This device was designed to conform to the law as written in SB-880/AB 1135, which defines “fixed magazine” to mean an ammunition feeding device contained in, or permanently attached to, a firearm in such a manner that the device cannot be removed without disassembly of the firearm action. Thousands of units have been installed and tested under the law. Multiple authorities have authorized use of our device. Since DOJ refuses to release an opinion letter we are unable to claim it is DOJ approved.


5 Reviews

  • 5
    I really do love it.

    Published by Devon Rosenthal on Jul 25th 2019

    The simplicity of the device is a huge driving point, and it provides in my opinion the most convenient and straight forward compliance solution on the market. Thanks for creating a way to keep so many rifles and pistols, particularly more uncommon models, safely in the hands of their owners without fear of repercussion!

  • 5

    Published by Joseph on May 22nd 2019

    Great item for keeping my AR NY compliant! Easy to install!

  • 4
    Awesome cost effective solution

    Published by Cristian Del Rio on Feb 6th 2019

    I'd like to start off by saying that I chose this product because it is the cheapest solution to owning an AR15 in California ( I can rant forever ). The product is extremely easy to install and easy to use. Initially it required some jiggling of the installed magazine for install and removal of the shim. Once I got it fitted it was too easy. I appreciate the price point especially when everything else is twice as much for just the basic compliance piece.

  • 5
    Works great

    Published by K&M ARMS on Dec 26th 2018

    I had a customer ask if this would work in the K&M ARMS M17S556 Bullpup that we build. So we contacted the company to send us one to see if it would work. Great product and works as advertised in our rifle.

  • 5
    Effective Product for my Needs

    Published by Unknown on Dec 14th 2018

    This is a great product, well designed and works flawlessly. Travelling to a free state, pop the pin out and you've just liberated your rifle. Thank you!

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