Custom Build Arms is the gun shop for all your shooting needs. We offer a wide selection of AR15 parts, including: AR 15 uppers, AR 15 lower parts, gun furniture, sights, optics, magazines, holsters, and etc. Custom Built Arms strives to provide the best quality customer service in the industry. Custom Built Arms offers the best value and low prices on AR 15 parts and items. Choose Custom Built Arms the next time you want to buy any AR 15 parts or items.