GM UPPER RECEIVER PARTS
Get the most out of your rifle with an AR 15 upper receiver from Gorilla Machining. Our selection of upper receivers includes AR stripped uppers, complete upper receivers, skeletonized uppers, barreled upper receivers and more. Choose from products made by the world’s top manufacturers.Shop high-quality AR-15 and AR-10 bolt carrier groups from Gorilla Machining ! Our M16 bolt carrier groups (bcg) are full-auto grade and magnetically particle inspected (MPI) to insure proper function with your mil-spec AR15 or AR10 rifle. Bolts and bolt carriers are made with 9310 Steel and have a black nitride finish. Our AR15 and AR10 bolt carrier groups are available in 5.56 NATO, .223 Remington, 300 Blackout, 350 Legend, .458 SOCOM, .450 Bushmaster, 7.62x39, 6.5 Grendel, 308, .243 Winchester, and 6.5 Creedmoor. All Gorilla Machining bolt carrier groups come with a bolt, bolt carrier, staked gas pin, firing pin, firing pin retainer pin, and bolt cam pin. Manufactured in Orlando,Fl !