Best Seller | Mega Arms Maten Billet Upper Receiver Black MEGA-MATEN-UPPER-BIL Mega Arms Maten Billet Upper Receiver Black MEGA-MATEN-UPPER-BIL. All receivers are precision-machined from solid billet aluminum and are held to extremely tight tolerances and high quality standards to ensure consistent fit and function. With its... more | | $341.00 FREE shipping go to store |