Shop 4,481 Deals on Upper Receivers

Stag Arms AR-15 Tactical Right Hand Upper Receiver 5.56 NATO 7.5in Barrel GOV-CMV Profile 1-7 Twist 1/2 x 28 Thread VG6 Delta Chromephos FDE

Stag Arms AR-10 Stag 10 Stripped Upper Receiver .308/6.5 Creedmoore Right Hand .210 DPMS High Profile Type 3 Hard Coat Anodized Black

Bear Creek Arsenal BC-15 6mm ARC 24in Bolt Action Style Upper Receiver Straight Fluted Heavy 1-8 5/8x24 Flash Hider 416R

Bear Creek Arsenal BC-15 .300 Blackout 8.5in Bolt Action Style Upper Receiver Heavy Barrel 1-8 Twist 5/8x24 Flash Hider Parkerized

Spikes Tactical Upper 5.56 16in Midlength LE w/BLK M-LOK Handguard & FSP

Aero Precision Complete Upper Receiver M4E1 16in 5.56 Mid Pencil Barrel EQ-12 HG Gen 2 FDE Cerakote

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EM-12 HG Gen 2 FDE Cerakote

Aero Precision Complete Upper Receiver M4E1 .300 Blackout Barrel EQ-12 HG No BCG/Charging Handle Gen 2 Anodized Black 16in APAR600231Q14

Aero Precision M4E1-T PRO CHF M4 5.56mm 11.5 inch Complete Upper Receiver Hanson Carbine Length 1-7 Twist A2 Birdcage Anodized Kodiak Brown

Aero Precision M4E1-T Complete Upper Receiver .300 AAC Blackout 8in Pistol Length S-One M-LOK Handguard Black

Aero Precision Complete Upper Receiver M4E1-E 18in .223 Wylde Fluted Barrel EM-15 Handguard Gen 2 Cerakote Flat Dark Earth

Aero Precision M4E1-T Complete Upper Receiver Threaded 5.56x45mm Mid Pencil 16in Barrel ATLAS S-ONE 15in Handguard M-LOK Cerakote Flat Dark Earth

Ghost Firearms Elite Complete Upper Receiver 7.62x39 16 inch Carbine Length 4150 Light HBAR Barrel 1-10 Twist 14 inch M-LOK Free Float Hand Guard A2

Grid Defense Complete Upper Receiver 5.56mm 7.5 inch Pistol Length 4150 M4 Barrel 1-7 Twist 9 inch Octagon M-LOK Rail Dimpled Flash Can Tungsten Gray

CMMG Mk4 .300BLK Resolute Upper Group Receiver 16.1in Sniper Grey

Spikes Tactical Upper 5.56 11.5in FN CHF w/9in BAR2 Rail

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

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

Guntec USA AR-15 Stripped Billet Upper Receiver Green

Maxim Defense Industries MDX 505 PDX/SCW Compatible URG Upper Receiver 5.56 NATO Hate Brake 1/2-28 Thread 5.5in Barrel Black

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

Aero Precision Complete Upper Receiver M4E1-T .300 16in Blackout Barrel 12in M-LOK ATLAS S-ONE Handguard Flat Dark Earth Cerakote Anodized Black

DEMO Jacob Grey Firearms 9mm 6in Complete Upper Assembly Black 9MMB6CUA

Aero Precision EPC-9 Threaded Complete Upper Receiver 16in 9mm w/ ATLAS R-ONE 15in Handguard FDE