LANTAC 16in Recon Complete Upper Receiver .223 Wylde/ 5.56mm 1/2-28 UNEF Rifle Length Black. 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 16in Recon Complete Upper Receiver: Manufacturer: LANTAC Barrel Length: 16 in Finish: Anodized Black Color: Black Gun Model: AR-15 Case Finish: Anodized Handle Color: Black Blade Finish: Anodized Handle Finish: Anodized Package Contents: LANTAC 16in Recon Complete Upper Receiver What firearm models does the manufacturer say LANTAC 16in Recon Complete Upper Receiver is compatible with? The manufacturer says that LANTAC 16in Recon Complete Upper Receiver is compatible with AR-15LANTAC 01-FA-223-RECON-UPR: 16in Recon Complete Upper Receiver .223 Wylde/ 5.56mm 1/2-28 UNEF Rifle Length Black