NOXs™ Billet 10.5"

NOXs™ Billet 10.5"


  • Limited Availability

The NOXs™ Billet is to upper receivers what the HMMV is to sport utility vehicles. Designed from the drawing board up as a high performance platform, the manufacturing and features are a wish list for the perfect rifle or carbine.

The upper receiver is CNC machined from a solid billet of 7075-T6 aluminum to Seekins Precision exceptional standards, far exceeding mil-spec requirements. The receiver and included NOXs™ hand guard top rails are seamless, providing monolithic receiver performance and maximum optics and accessory mounting options. Both the receiver and hand guard are Type III Class 2 Hardcoat Anodized matte black.

Extremely lightweight and infinitely adaptable because of the MLOK attachment system, the included NOXs™ hand guard is perfect for tactical and competition use. Precision machined from 6061-T6 aluminum, it features a seamless top Picatinny rail and MLOK slots at 3, 6 and 9 O’clock positions for solid mounting of accessories where needed.

NOXs™ Billet 10.5" Upper comes standard with a match grade barrel in either .223 Wylde or .300 BLK. Unlike conventional upper receivers, the NOXs™ Billet gas system can be fine tuned for performance and reliability because of the included Seekins Precision Adjustable Gas Block. The gas block and Carbine Length Gas Tube (.223 Wylde) or Pistol Length Gas tube (.300 Blackout) are Melonite coated for reliability and ease of maintenance. Seekins highly effective Melonite coated Rook Flash Hider is also included.

NOXs™ Billet uppers are compatible with MIL-SPEC lower receivers and most aftermarket rail systems.

  • Upper CNC Machined from solid 7075-T6 Billet aluminum
  • NOXs™ 9" Hand Guard
  • Aggressive unique design lines only offered on Seekins Precision Billet uppers
  • M4 Feed Ramps
  • MIL-SPEC Full length 1913 picatinny top rail that allows seamless mounting with handguard
  • Type III Class 2 Hardcoat Anodized Finish
  • Match Grade 10.5" Barrel
  • Carbine Length Gas System (.223) and Pistol (.300 Blackout)
  • The .223 Wylde chamber takes advantage of .223 Remington accuracy while still able to safely and accurately shoot the higher pressure 5.56mm NATO ammunition.
  • Melonited Adjustable Gas Block, Gas tube and M16 Bolt Carrier Group
  • Melonited Rook Flash Hider
  • 5 Machined in Anti-Rotation QD sling mounts
  • Scalloped rails to remove all sharp edges for comfort


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10.5 upper

by James

Very light and nicely built. the hand guard is slim and feels good in the hand. the only thing i would add is it would be nice if instructions were included for adjusting the gas block. this is not that big of a deal though, you can find them with a google search.

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