LANTAC UAR AR15 Upper Advanced Receiver

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  • LANTAC UAR AR15 Upper Advanced Receiver
  • LANTAC UAR AR15 Upper Advanced Receiver
  • LANTAC UAR AR15 Upper Advanced Receiver
  • LANTAC UAR AR15 Upper Advanced Receiver
  • LANTAC UAR AR15 Upper Advanced Receiver
  • LANTAC UAR AR15 Upper Advanced Receiver
  • LANTAC UAR AR15 Upper Advanced Receiver
  • LANTAC UAR AR15 Upper Advanced Receiver
MSRP: $249.00
— You save $19.01
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LANTAC UAR AR15 Upper Advanced Receiver

The patent pending SMOOTHCAM system features a domed head, low friction cam pin and special upper receiver that offer ultra smooth operation. With its blended cam recess the UAR upper is machined from Billet 7075-T6 certified aluminum and milspec, Type3, Class2, Deep Black, Hardcoat Anodized. The UAR is a precision machined upper with a special burnished bore that gives a compacted internal surface with a roughness average in micro inches of 16, as opposed to standard bored or milled uppers that are 32-63, or higher. This reduces bolt carrier friction and creates a much smoother operation. Barrel nut threads, bore and barrel extension surfaces are all machined in one operation so that they are perfectly concentric and perpendicular to the barrel and fixing assembly. The cam pin recess has been carefully designed with a smooth surface that flows into the main reciprocation channel. This allows our specially designed radial, domed head cam pin to move with the minimum of wear against these internal surfaces.

The CP-R360 Cam Pin has no moving parts to break or lock up. Machined from 17-4 PH Stainless Steel and hardened to H900 (45RC Approx) its head is polished for a super smooth finish. The cam pins circular head has a single flat face machined into it at the front so that it can be inserted into any bolt carrier without having to remove the gas key. Two further flats are machined at 90 degrees to the front face that assist in reducing internal wear to the cam channel. The unique domed head allows the cam pin to operate in a completely different position to a traditional pin, with the radius of the head curving away from the receivers internal surface, rather than forming a hard or sharp edge on its upper corner that causes wear. Finished in its natural hardened state, copper/brass color. Used in conjunction with our UAR upper and you have a complete, ultra smooth, low friction, minimum wear system.

Package Includes CP-R360 Domed head ultra smooth Cam Pin.


  • Material: Billet 7075-T6 Aluminum
  • Finish: Milspec Type3, Class2 Deep Black Hardcoat Anodize.
  • Super smooth burnished Bore.
  • M4 Feedramps as standard.
  • Blended Smoothcam system Includes CP-R360 Domed Head Cam Pin.
  • Made in the USA.
  • Stripped Weight 8.8oz (249.4g).
  • Mil/LE Discount available, please contact us.

ITAR Notice: This product is manufactured in the USA by LANTAC USA LLC for sale within the USA only. Export of the commodities described herein is strictly prohibited without a valid export license issued by the U.S. Department of State, Office of Defense Trade Controls, prescribed in the International Traffic in Arms Regulation (ITAR), Title 22, Code of Federal Regulations, Parts 120-130.

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1 Review

  • 5
    Best upper for the best price.

    Posted by Brian M. - Las Vegas on 5th Sep 2016

    This is arguably the best upper on the market and Bauer Precision had by far the best price I found anywhere. My order was processed, shipped and received faster than I could have ever imagined. I will absolutely come back for future pieces.

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