0940 Pistol Caliber Upper Receiver

5.5″ UDP Series Handguard

6″ 40 S&W AR-15 Barrel

6″ 9mm AR-15 Barrel

9mm Buffer Kit

0940 Proprietary Parts Kit

9mm Flash Hider

9mm AR-15 Carbine Buffer

9mm Buffer Spacer

9mm Firing Pin

0940 Anti-Rotation Pins

9mm Bolt Catch Spring Kit