• 7075-T6 Aluminum
• Type III Class 2 Hard Coat Black Anodized
• Precision Broached Magazine Well
• Full M4 Cut Fire Control Group Pocket
• Right Side Bolt Release Lever Included
• Threaded Bolt Catch Pin Included
• Rear Takedown Detent Spring Retained with Set Screw Included
• Upper Receiver Tension Screw Included
• Marked Outerwild
• Model Outerwild15A
• 100% American Made

Rock-Op Defense AR15 billet lower receivers are the perfect foundation for your custom AR15 kit build. We start with a solid billet of 7075-T6 aluminum and then precisely machine all of the critical features and dimensions of the AR15 lower to ensure that every receiver is perfectly in spec. We then broach the magazine well for a perfect magazine fit, hand deburr, tumble and hard coat anodize. The result of our time and attention to detail is an AR15 billet receiver that will last you a lifetime and guarantee you a worry-free and quality build. These receivers accept all Mil-Spec components and look great with both a Rock-Op Defense billet or forged upper receiver.