http://www.sportsmansguide.com/net/cb/fldng-pistol-grip-m16-m4-ar15.aspx?a=715708
What if ICS added this to all their guns?? quick motor change AND quick upper gearbox change! revolutionary!! go from systema turbo motor and m100 spring, then in 60 seconds you could change it to an upper gearbox with m170 spring and change motor to systema magnum
What if ICS added this to all their guns?? quick motor change AND quick upper gearbox change! revolutionary!! go from systema turbo motor and m100 spring, then in 60 seconds you could change it to an upper gearbox with m170 spring and change motor to systema magnum