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LANTAC UAR Upper Advanced Receiver AR-15


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LANTAC UAR Upper Advanced AR-15 Receiver

The LANTAC SMOOTHCAM system is optimized for use with a Lantac NiB Nickel Boron BCG due to the domed Campin head for smooth operation. The Receiver features a blended cam recess for that BCG. Upper comes completely machined from Billet 7075 T6 Certified Mil-Spec Aluminum in Milspec. It has been Type III Class II Deep Black Hardcoat Anodized. Everything about the internals is machined for precision from the special burnished bore that gives a compacted internal surface with a roughness of micro inches of 16 as opposed to standard uppers with 32-63 so guaranteed smooth!


  • Must have for precision build
  • Billet 7075-T6 Aluminum- Mil-Spec
  • Special Burnished Bore
  • Micro Inches 16 roughness (Standard is 32-63)
  • Reduces Bolt Carrier Friction for precision and smoother operation
  • Cam Pin Recess allows Cam Pin to flow through main reciprocation channel
  • Optimized for use with LANTAC NiB BCG but works with standard Groups


  • Material: Billet 7075-T6 Aluminum
  • Finish: Milspec Type3, Class2 Deep Black Hardcoat Anodize.
  • Super smooth burnished Bore.
  • M4 Feedramps as standard.
  • Blended Smoothcam system



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