AR-10 - F.N.G.R. Fixed Magazine Kit

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The first and only fixed magazine compliance device to make large frame AR10/SR25 firearms California/NY Legal while using the original mil-spec magazine catch. With MagLatch F.N.G.R. installed your firearm is no longer 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 perfectly good solution. That means no funny arms, milling, or drilling your lower. Our compliant device converts your firearm bypassing assault weapon registration requirements. We're the first and only device on the market to reverse in 5 seconds or less. That's right, you can go in and out of state compliance by simply separating the upper/lower receivers and removing the F.N.G.R. shim. Perfect for competition shooters who travel to restrictive states or vigilant citizens behind enemy lines. Zombie Apocalypse? Martial Law? Revolution? We're the device for the job. 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.

Type 0: LMT and other AR-10 lowers with a recess measuring approximately 0.475" wide.

Type 1: Aero Precision, CMMG, LMT, Mega Arms MATEN and other AR-10 lowers with a recess measuring approximately 0.400" wide. (Please note, this option utilizes a mil-spec magazine catch, and not the ambi-dextrous catch.)

Type 2: LWRC REPR, Sig Sauer 716, and other AR-10 lowers with a recess measuring approximately 0.600" wide. Anderson AM-10's or lowers with beveled recesses may require minor fitting. (Please note, this option utilizes a mil-spec magazine catch, and not the ambi-dextrous catch.)

Fits on most AR-10/SR-25 style firearms and others utilizing a standard AR-15/AR-10 magazine catch. Certain AR-10's have either no recess or a smaller recess where the F.N.G.R. sits and fitting of the F.N.G.R. may be necessary.  Will not work on AR10 lowers that utilize a commercial or non-mil-spec magazine catch.

Kit includes:

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

Click here to order backup F.N.G.R.'s

Manufactured in Goleta, CA

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 CA 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.


1 Review

  • 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 M17S308 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.

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