The Colt GAU-5AA is a reproduction of a military classic. The GAU-5AA is infamous for its use during the Son Tay raid in 1970, otherwise known as Operation Ivory Coast. The Colt GAU-5AA utilizes a 'slick side' A1 upper receiver and period correct pencil profile barrel with 1:12" rifling. Additional features include a correct A1 profile lower receiver, DoD Acceptance Stamp, shaved bayonet lug, aluminum CAR stock, skinny 2-piece handguards and a non-NFA XM moderator with grenade ring pinned to meet a barrel length of 16". This is a 1 of 500 item