LanTac USA LLC Urban Tactical Complete Upper Receiver 223 Wylde 11.5" Barrel Fits AR-15 Anodized Finish Black. Each URG is shot tested at facility and comes with a lifetime warranty against defects. The LA-SF15 URG is manufactured using enhanced forged receiver that features a radiused cam pin recess that works with patented CP-R360 Domed Head Cam Pin that reduces wear and friction. The E-BCG Bolt Carrier Group features enlarged and forward facing gas ports that vent gas away from the shooter runs flatter with reduced recoil and the Carriers flared tail enhances accuracy. Specifications for LANTAC 11.5in UTP Complete Upper Receiver: Manufacturer: LANTAC Barrel Length: 11.5 in Finish: Matte Black Color: Black Gun Model: AR-15 Handle Color: Black Blade Finish: Matte Case Finish: Matte Package Contents: LANTAC 11.5in UTP Complete Upper Receiver What firearm models does the manufacturer say LANTAC 11.5in UTP Complete Upper Receiver is compatible with? The manufacturer suggests that LANTAC 11.5in UTP Complete Upper Receiver is compatible with AR-15LANTAC 01-FA-223-UTP-UPR: 11.5in UTP Complete Upper Receiver .223 Wylde/ 5.56mm 1/2-28 UNEF Mid-Length Black