R&D Precision PW9 Colt/Glock 9mm 5 inch Upper Receiver Kit Socom 1-10 Twist 1/2x36 Comp/Brake Hybrid Black

R&D Precision PW9 Colt/Glock 9mm 5 inch Upper Receiver Kit Socom 1-10 Twist 1/2x36 Comp/Brake Hybrid Black. The kit consists of: Billet upper receiver proprietary to the design. 6" handguard with forward charging assembly 5.5" 9mm barrel with 1/2-36 threaded muzzle device. Patented 9mm Bolt Carrier Group with recoil spring proprietary to the design Recoil Brake assembly and end cap proprietary to the design (This attachment replaces the need for a standard buffer tube buffer and spring) These AR