Shop 4,464 Deals on Upper Receivers

Caracal CAR816 A2 Patrol 5.56x45mm NATO Complete Upper 16in Barrel

Knights Armament SR-25 CC 7.62 14.5 Upper URX4 MLOK

AR-STONER AR-15 Pistol Upper Receiver Assembly 300 AAC Blackout 8" Barrel Pistol Length M-LOK Handguard

Sons of Liberty Gun Works AR-15 L89 Broadsword Upper Receiver Assembly 5.56x45mm 13.9" Cold Hammer Forged Barrel 13.75" L89 M-LOK Rail

Aero Precision M5E1 Complete Upper Reciever 6.5 CM 24in Rifle Barrel 1-8 Twist 5/8x24 Thread Free-Float Handguard Stainless Steel Anodized Black

Primary Weapons Systems MK216 MOD1-M Upper Receiver 16in bbl Black

Seekins Precision DMR .223 Wylde 16" 1:8" Bbl Black Complete Upper Receiver 0011100025

Seekins Precision NX15 .223 Wylde 16" 1:8" Bbl Black Complete Upper Receiver 0011100077

TacFire AR Pistol Build Kit 9mm 5 Barrel Mil-Spec

JARD Bolt Action Knob Tactical Outer Diameter 0.850in Length 1.4in 5/16x26 Aluminum Black

Anderson Manufacturing AM-15 Complete Upper Black .223 Rem 16-inch Optic-Ready

Cross Machine Tool Ultra Precision AR-15 Billet Upper Receiver - No Forward Assist

Bootleg Inc Mil-Spec AR-15 Complete Upper Flat Top M4 Feed Ramps Black

Dirty Bird AR-15 Stripped Upper Receiver-Blem - Black

American Tactical Imports Mil Sport Complete Ar-15 Upper 300 Aac 16" Black

Bushmaster Bravo Zulu A4 5.56 NATO Upper Receiver 16in 1-8 Twist Black

Del-Ton AR-15 A3 Upper Receiver Assembly 5.56x45mm NATO 16" 1 in 9" Twist Lightweight Contour Barrel

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Slick Side 13.9in Mid Burnt Bronze

Stag Arms Stag 15 M4 Upper 5.56 16 Barrel Left Hand

LWRC International LWRC IC-A5 5.56mm NATO 10.5" 1:7" 1/2x28 FDE Complete Upper Receiver ICA5U5CK10S

CMMG Resolute MK4 Upper Burnt Bronze 5.56 16.1 Barrel No BCG/Charging Handle

Primary Weapons Systems MK218 MOD1-M Upper Receiver 18in bbl 6.5 Creedmoor 3-Setting Adjustable Gas System PRC30 Compensator Black

Dirty Bird AR-15 Stripped Upper Receiver-Blem - Magpul OD Green

Dirty Bird AR-15 Assembled Upper Receiver-Blem