D D dnye1986 Oct 25, 2024 Shooting in my fx m4 impact .35 with Huma v2 tuning kit, hammer weight valve return springs and slug probe and slug barrel. 920 fps 174.9ft lbs
Shooting in my fx m4 impact .35 with Huma v2 tuning kit, hammer weight valve return springs and slug probe and slug barrel. 920 fps 174.9ft lbs
