Upper Receivers

The Sons of Liberty Gun Works stripped upper and lower receivers are made to the tightest tolerances while still being compatible with Mil-Spec parts and upper receivers. This ensures that there is absolutely no wobble between receivers which can affect...

The Broadsword-89 Uppers and Drivelock (89 Series) rails provide arguably the most rigid interface on the market using traditional 2-piece AR15 construction.  The extended barrel nut, Drivelock tensioning crossbolts, and keyed upper receiver face...

LMT Defense - M4 Upper Receiver Assembly M16/M4 Style flat top upper receiver. Compatible with mil-spec barrel and barrel nut configurations. Comes complete with forward assist and port door assemblies.

Fully machined and finished, military style uppers ready for you to install your choice of barrel, carrier, bolt, forearm, and lower to build a custom AR-15. A2 carry handle style. Precision machined from a premium-grade Cerro aluminum forging and Tan...

The M4E1 Threaded Upper Receiver features a new angular machined design that helps it stand apart from standard mil-spec upper receivers. This upper receiver features the same enhanced body profile as our M4E1 Enhanced Upper Receiver but is threaded to...

The Triarc Systems TSR-15 SPR Upper seeks to redefine what a factory SPR barreled assembly can be; incorporating the most functional component choices possible, Triarc System has invigorated the tried and true concept of a 16" suppressed 5.56 rifle...

NOTE: This part features a colored anodized finish. These finishes are held to different aesthetic standards than parts finished in black anodizing or Cerakote. For more information on colored anodizing visit our Knowledge Center. Our state of...

Barrel• 16” 5.56mm 416R Stainless with 1:7 twist• Individual serialized barrel for QC purposes• Hand polished Noveske Match Chamber• Mid length gas tube system• Noveske marked gas block: Low profile, .750” journal,...

Aero Precision AR15 Atlas R-One M-LOK Handguard ODG Anodized  The ATLAS R-ONE is the newest addition to the Aero Precision Handguard lineup. Machined from 6061-T6 Aluminum, the R-ONE line of handguards are designed with size and weight in mind,...

Aero Precision AR15 Atlas R-One M-LOK Handguard Kodiak Brown  The ATLAS R-ONE is the newest addition to the Aero Precision Handguard lineup. Machined from 6061-T6 Aluminum, the R-ONE line of handguards are designed with size and weight in mind,...

AR15 ASSEMBLED UPPER RECEIVER, NO FORWARD ASSIST - ANODIZED BLACK The AR15 Assembled Upper Receiver comes with the port door already installed. This specific model does not have forward assist provisions. Forged from 7075-T6 aluminum, this assembled...

Aero Precision M5 16" .308 CMV Complete Upper Receiver with ATLAS R-ONE Handguard - OD Green Anodized Aero Precision APAR538772M22: The R-ONE handguards are designed with size and weight in mind, while still providing plenty of real-estate to...