LanTac UAR LA00221 Billet Upper Receiver

LanTac Upper Advanced Receiver (UAR)

The LanTac UAR represents a significant advancement in upper receiver design, built around the patent-pending SmoothCam system. This precision-engineered component transforms how your rifle cycles, delivering noticeably smoother operation and reduced wear on critical internal surfaces.

Superior Materials and Finish

• Billet 7075-T6 Aluminum: Machined from certified aerospace-grade aluminum for exceptional strength and durability
• Milspec Type 3, Class 2 Hardcoat Anodize: Deep black finish provides superior corrosion resistance and a professional appearance
• Includes CP-R360 Domed Head Cam Pin: Specially designed to work seamlessly with the UAR's proprietary geometry

Engineering Excellence

The UAR's advantage lies in its meticulous attention to internal geometry. The bore is machined to an ultra-smooth 16 micro-inch roughness average—compared to standard uppers at 32-63 micro-inches or higher. This precision dramatically reduces bolt carrier friction during cycling.

The barrel nut threads, bore, and barrel extension surfaces are machined in a single operation, ensuring perfect concentricity and perpendicularity. The cam pin recess features a carefully blended surface that flows smoothly into the reciprocation channel, allowing the domed head cam pin to operate with minimal wear.

The Result

You'll experience noticeably smoother bolt carrier operation, reduced felt recoil impulse, and extended component life. Whether you're a competitive shooter seeking every advantage or a serious enthusiast who demands the best, the LanTac UAR delivers measurable performance improvements.