CMMG 55DE10A Barrel Sub-Assembly 5.56x45mm NATO 16.10" Black Nitride Finish 4140 Chromoly Steel Material Carbine Length with M4 Profile for AR-15 Extra Barrels the button of our Bullet

the button of our Bullet Proof Tactical Magazine Release is slightly extended 1/16" over a stock part for fast

no fragmentation

its also compatible with OEM and aftermarket grips

It includes a system-disable feature

Performance 1/4 Zip is made with 85% Polyester/15% Spandex and features 1/4 zip line a chest logo

CMMG 55DE10A Barrel Sub-Assembly 5.56x45mm NATO 16.10" Black Nitride Finish 4140 Chromoly Steel Material Carbine Length with M4 Profile for AR-15 Extra Barrels the button of our BulletCMMG's Barrel Sub Assembly is ideal for building your custom AR 15 upper group. It comes with properly installed M4 barrel extension.