Shop 4,484 Deals on Upper Receivers

Guntec USA AR .308 Gen 2 Stripped Billet Upper Receiver Clear

Dark Storm Industries DS-15 AR-15 .300 AAC Blackout 12.5 inch Upper Receiver SOCOM Profile Pistol Length 1-7 Twist Firestorm Compensator Magpul MVG

Maxim Defense Industries MDX 510 U.R.G. AR-15 5.56x45mm NATO 10.3 inch Upper Receiver Pistol Length 1-7 Twist 1/2x28 HATEBRAKE Urban

Maxim Defense Industries MDX 505 PDX/SCW Compatible URG Upper Receiver 300 BLK NATO Hate Brake 5/8-24 Thread 5.5in Barrel Black

Maxim Defense Industries MDX 505 PDX/SCW Compatible URG Upper Receiver 7.62x39 Hate Brake 5/8-24 Thread 5.5in Barrel Black

WMD Guns AR-15 A3/A4 Upper Receiver Forged w/M4 Feed Ramps Stripped NiB-X Burnt Bronze 1-NIBXUF-Burnt Bronze

Spikes Tactical Upper 5.56 16in Midlength LE w/MOE Grey SL Handguard

Spikes Tactical Upper 5.56 16in M4 LE w/10in BAR2 Rail

Aero Precision Complete Upper Receiver M4E1 16in 5.56 Mid Pencil Barrel EM-15 HG Gen 2 Anodized Black

Stag Arms AR-15 3-Gun Elite Right HandUpper Receiver 5.56 NATO 18in Barrel NJ Compliant Heavy-Fluted Profile 1-8 Twist VG6 Gamma Black

Stag Arms AR-15 Tactical Upper Receiver 5.56x45mm NATO 10.5in Barrel GOV-CMV Profile 1-7 Twist 1/2x28 Left Hand VG6 Delta Black

Aero Precision M4E1 Threaded No Forward Assist Complete Upper Receiver 10.5in 5.56 Carbine RM9.2 FDE

CMMG Mk4 .300BLK Resolute Upper Group Receiver 16.1in Tungsten

Spikes Tactical Upper 5.56 16in M4 LE w/ 12in SAR Rail

CMMG Dissent Mk3 .308 Winchester 20 inch Upper Receiver 1-10 Twist 5/8 x 24 CMMG ZEROED Muzzle Brake Cerakote/Hard Coat Anodized Midnight Bronze

Maxim Defense Industries MDX 508 U.R.G. AR-15 7.62x39mm 8.5 inch Upper Receiver Pistol Length 1-10 Twist 5/8x24 HATEBRAKE Urban

WMD Guns Upper Assembly Billet AR-15 .224 MLOK HG 15in 20in Barrel NiB-X Nickel

Bear Creek Arsenal BC-10 .308 Winchester 20in Bolt Action Style Upper Receiver Straight SOCOM 1-10 5/8x24 Flash Hider 416R

Moriarti Upper Receiver with Flash Hider AR-15 5.56 Nato 10.5 inch Barrel Government Contour Carbine Length 1x7 Twist 1/2X28 Thread M-LOK Handguard A2

Grid Defense Complete Upper Receiver 5.56mm 16 inch Carbine Length 4150 M4 Barrel 1-7 Twist 14 inch M-LOK Rail A2 Flash Hider Tactical Grape

Grid Defense Complete Upper Receiver 5.56mm 16 inch Carbine Length 4150 M4 Barrel 1-7 Twist 14 inch M-LOK Rail A2 Flash Hider Burnt Bronze

Spikes Tactical Upper 5.56 16in M4 LE w/MOE FDE SL Handguard

Stag Arms AR-15 Tactical Upper Receiver 5.56x45mm NATO 7.5in Barrel GOV-CMV Profile 1-7 Twist 1/2x28 Left Hand VG6 Delta Nitride FDE

Stag Arms AR-10 Marksman Right Hand Upper Receiver 308 Win 18in Barrel HBAR-CMV Profile 1-10 Twist 5/8X24 Thread VG6 Gamma FDE