LANTAC 7.5in PDP Complete Upper Receiver .223 Wylde/ 5.56mm 1/2-28 UNF Pistol Length 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 7.5in PDP Complete Upper Receiver: Manufacturer: LANTAC Barrel Length: 7.5 in Gas System Length: Pistol Length Finish: Matte Black Color: Black Gun Model: AR-15 Handle Color: Black Blade Finish: Matte Case Finish: Matte Package Contents: LANTAC 7.5in PDP Complete Upper Receiver What firearm models does the manufacturer say LANTAC 7.5in PDP Complete Upper Receiver is compatible with? The manufacturer suggests that LANTAC 7.5in PDP Complete Upper Receiver is compatible with AR-15LANTAC 01-FA-223-PDP-UPR: 7.5in PDP Complete Upper Receiver .223 Wylde/ 5.56mm 1/2-28 UNF Pistol Length Black