Quarter Circle 10 Complete 9mm Upper w/ PMUR 16in Barrel 1/2 - 28 15in HG FH Black

Quarter Circle 10 Complete 9mm Upper w/ PMUR 16in Barrel 1/2 - 28 15in HG FH Black. 355 Caliber Features of Quarter Circle 10 Complete 9mm Upper w/ PMUR: QC10 Billet Rear Charging Upper Receiver 9x19mm QPQ Nitride-Treated Barrel Compatible with QC10 Ranger (GSF) Rider (CLT9MM) and Blu Whistler (Sig P320) Lower Receivers QC10 Universal Panted 9x19mm Bolt Ambidextrous Charging Handle QC10 Pistol Caliber Flash Hider Made For the AR Platform - Not Modified Package Contents: Quarter Circle 10 Complete 9mm Upper w/ PMUR Which weapon models is Quarter Circle 10 Complete 9mm Upper w/ PMUR compatible with? Quarter Circle 10 Complete 9mm Upper w/ PMUR is compatible with QC10 Ranger QC10 Rider QC5 QC10 Blu' WhistlerQuarter Circle 10 QC-CU-G9-16: Complete 9mm Upper w/ PMUR 16in Barrel 1/2 - 28 15in HG FH Black