Cross Armory CRSM308A Safe Mag 308/AR-10 Magazine Locking System 308/7.62 .875" W 7075 T6 Aluminum Black
Cross Armory's Safe Mag is a magazine locking system modification, designed in California, for weapons in regulated states that require fixed magazines. It prevents the removal of the magazine from your rifle without disassembly of the action when properly installed. The Cross Armory Safe Mag is easy to install and works by releasing your magazine instantly when you separate the upper and lower receivers of your firearm (which disables the firearm action), without having to press a button. The Safe Mag also allows for insertion of a new magazine when the upper receiver and lower receiver are closed, without bending or stressing the hardware of the weapon or the Safe Mag.
This Safe Mag is the 308 Aero configuration and is compatible with 308/AR-10 models measuring 7/8" (0.875") wide at the base of the upper receiver (directly above the trigger). The Aero configuration is compatible with an M&P 10, but requires a spacer to make the fit perfect. Note: If it is 1-1/4" (1.25") wide, you will need the DPMS configuration.