Upper Receivers

Cmmg Mk3 Ejection Port Cover Kit OPEN BOX  OPENED BAG, PRODUCT IS NEW  Includes Mk3 ejection port cover, rod, and spring. CMMG, Ejection Port Cover Kit, Mk3, Ejection Port, Rod, and Spring, Black Finish .308 Ejection port...

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...

The SOLGW M4-L89 14.5" 5.56 V2 Complete Upper Receiver HUX Pinned is designed for those who demand peak performance and versatility. Featuring a 14.5" SOLGW V2 profile barrel and a 13.75" L89 Rail, this upper offers a perfect blend of accuracy, handling,...

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...

Noveske, Chainsaw, Stripped Upper, N4, Black Finish

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...

Complete A2 rear sight kit, this kit requires assembly and will mount on an A2 upper receiver. Luth-AR, A2 Rear Sight Kit, Fits A2 Upper Receivers For AR-15 Firarms, Black UR-29 A2 Rear Base Lug (x1) UR-27 A2 Rear Sight Aperture (x1) UR-28 Rear...

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,...