Shop 4,462 Deals on Upper Receivers

Geissele Automatics Super Duty Stripped Upper Flat Dark Earth 5.56 16 Barrel

Radian Weapons Model 1 16" MOE Upper .223 Wylde 1:8 M-LOK Rail Mid-Length with BCG and CH, Radian Brown - R0472

Guntec USA AR-15 Stripped Billet Upper Receiver MIL-A-8625 Type III Anodized Black

Aero Precision M4E1-T 20" Railed Upper 6.5 Grendel 1:8 Rifle-Length no BCG&CH, Black

Aero Precision M4E1 Enhanced Upper w/o Forward Assist, Flat Dark Earth

Primary Weapons Systems MK1 Mod 1 Complete Upper .223 Wylde 7.75 Barrel

Aero Precision Assembled Upper Receiver No Forward Assist

CMMG Endeavor 20" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with BCG and CH - Tungsten - 28B3D0CTNG

Phoenix HP22/HP22A 5" Barrel .22 LR Conversion Kit, Nickel - HP22BBLN

Black Rain Ordnance Bro-Carnivore 16" Upper Receiver .450 Bushmaster - Armor Black with M-LOK Rail - 450B

Aero Precision Complete Upper Receiver w/ ATLAS S-ONE Handguard M5 22in Barrel 6.5mm Creedmoor Rifle Length SM15 Anodized Black

CMMG Dissent 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with Charging Handle - Armor Black - 28B940CAB

Primary Weapons Systems MK107 MOD 2-M AR-15 7.62x39 7.75in Upper Receiver CQB 30 Muzzle Device Anodized Finish Black MLOK Handguard Long Stroke Piston

Radian Weapons Model 1 MOE Upper M-LOK Rail with Charging Handle, Black - Elite Tactical - R0192

Aero Precision Stripped Upper Receiver No Forward Assist

Sons of Liberty Gun Works M4-L89 14.50" Upper 5.56x45mm, Black

Bushmaster Bravo Zulu Upper .450 BM 16 Barrel

CMMG Endeavor 20" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with BCG and CH - Charcoal Green - 28B3D0CCG

Aero Precision Complete Upper Receiver M4E1-T RM12.7 5.56x45mm NATO 13.9in Government Mid Length 1 in 7 1/2 x 28 12.7in A2 Flash Hider Cerakote FDE

TacFire 5" Upper 7.62x39mm 1:10 Free Float M-LOK Picatinny Rail, Black

CMMG Resolute 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with BCG and CH - Tungsten - 28B260CTNG

Primary Weapons Systems MK116 .223 Wylde Upper with 16.1" Barrel, Black - 182M116UA0B

Battle Arms Authority Elite 16" Upper 5.56x45mm Free Float M-LOK Rail, Black

Aero Precision LR-308 M5 Complete Upper Assembly 6.5 Creedmoor 22" Stainless Steel Fluted Barrel 15" ATLAS S-ONE Handguard Flat Dark Earth