Assault rifle 3D model of firearms Modern firearms American assault rifle M4A1 Assault Rifle Vertical Grip Enhance stability Pneumatic operating principle Short stroke piston system M4A1

Assault rifle 3D model of firearms Modern firearms 5.56 × 45mm NATO standard ammunition M4A1 Assault Rifle from the United States American assault rifle M4A1 Assault Rifle Variants of the M16 rifle series Picatinny rail Semi automatic and fully automatic shooting