MPN: 0011100093


  • Caliber: 5.56 NATO / .223 Rem.
  • Chamber: .223 Wylde
  • Finish: Type III Class 2 Hardcoat Anodized Finish
  • Upper Receiver: Seekin Precision NX15 Upper - CNC Machined From Solid 7075-T6 Billet Aluminum
  • Handguard: 12" Seekin Precision NOXs M-LOK Handguard - CNC Machined From 6061-T6 Aluminum
  • M4 Feed Ramps: Yes
  • Muzzle Device: Seekins Precision Melonited Nest Flash Hider
  • Barrel: 14.5” 1:8 Match Grade 416 Stainless Steel .223 Wylde Barrel
  • Muzzle Thread Pattern: 1/2"-28
  • Gas Block: Seekins Precision Melonited Adjustable Gas Block
  • Gas Tube: Mid-Length Melonited Gas Tube
  • Bolt Carrier Group: Seekins Precision Melonite Coated NX15 Bolt Carrier Group
  • Charging Handle: Seekins Precision DNA Charging Handle


  • Weight: 4.41 lbs.
  • Length: 23.25"

*This upper receiver assembly has a barrel that is shorter than 16". This upper is only for use on AR pistol lower receivers and NFA registered Short-Barreled Rifle (SBR) lower receivers. All NFA laws apply!


  • AR-15 lower receivers


If you’re looking for a sturdy AR-15 14.5" upper assembly, consider the 14.5” NX14 complete upper by Seekins Precision.

The Seekins NX Series upper receivers were appropriately named. Made to standards that go above and beyond Mil-Spec requirements, the upper receiver of the NX14 is designed to have a superior fit with a remarkable performance, time and time again.

What Makes The NX14 Complete Upper Better Than Others?

As with all other barrels by Seekins Precision, this match grade barrel chambered in .223 Wylde was passed through four separate quality tests. The barrel has a non-glare bead blast finish which then Armor Black coated to offer you the accuracy of a precision rifle and is easy to maintain.

The gas block is completely adjustable for optimal load tuning. The gas system and the bolt carrier group are both Melonite-coated to prevent corrosion and to keep the cleaning process quick and easy.

A 12” NOXs M-LOK handguard is included with the NX14 upper to enhance its functionality. The handy M-LOK slots and the full-length top picatinny rail permit full customization capabilities for the avid shooter. The NX14 complete upper is compatible with all Mil-Spec lower receivers.

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