Shop 1,689 Deals on Complete Uppers

CMMG Dissent 10.50" Upper 5.56x45mm with 1:7 Twist Rate and M-LOK Rail - Pistol-Length with Charging Handle - Armor Black - 55B8D86AB

CMMG Resolute 16.10" Upper 9mm with 1:10 Twist Rate and M-LOK Rail - Carbine-Length with BCG and CH - Armor Black - 99BE6B6AB

CMMG Resolute 16.10" Upper 5.7x28mm with 1:9 Twist Rate and M-LOK Rail - Carbine-Length with BCG and CH - Armor Black - 57B40E4AB

CMMG Dissent 10.50" Upper 9mm with 1:10 Twist Rate and M-LOK Rail - Pistol-Length with Charging Handle - Armor Black - 99B80E4AB

Tacfire 16" Complete Upper Assembly .45 ACP 1:16, Black - BU-45ACP-16

Colt EPR 11.5" 5.56 AR-15 Upper, Black - LE6933EPR-CK

Aero Precision EPC-9 Threaded Complete Upper Receiver 11in 9mm w/ ATLAS R-ONE 10.3in Handguard Anodized Black

Aero Precision M4E1 Assembled Upper Flat Dark Earth .350 Legend 20 Barrel

Aero Precision M4E1 Threaded .300 Blackout Complete Upper Receiver 10in 1-7 Twist 5/8x24 Thread ATLAS R-ONE Handguard FDE Cerakote

Aero Precision EPC-9 Assembled Upper 9mm 11 Barrel No BCG / CH

Aero Precision EPC-9 Assembled Upper 9mm 16 Barrel No BCG/CH

Aero Precision EPC-9 Assembled Upper 9mm 5.5 Barrel No BCG/CH

Aero Precision M4E1-T Complete Upper 6.5 Grendel 18 Barrel

Aero Precision Threaded Upper Receiver M4E1 5.56 11.5 inch Barrel 9 inch M-LOK ATLAS R-ONE Handguard A2 Flash Hider Flat Dark Earth

Primary Weapons Systems MK116 MOD 1-M .223 Wylde 16" Barrel Complete Upper, Chrome-Lined Black - M116UA0B

Primary Weapons Systems MK111 MOD 2-M .223 Wylde 11.85" Barrel Complete Upper, Black - 182M111UA0B

Primary Weapons Systems MK111 Mod 1-M 11.85" Upper .223 Wylde M-LOK Rail, Black

Del-Ton 11.50" Classic Upper 5.56x45mm 1:9 Carbine-Length, Black

CMMG Resolute 16.10" Upper 8.6 Blackout 1:3 M-LOK Rail Carbine-Length, Armor Black

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

Rock River Arms CLB 16" Classic Upper .458 SOCOM 1:14 M-LOK Carbine-Length with BCG and CH, Black - Heavy Duty Performance - SOC0820.V1

CMMG Resolute 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with BCG and CH - Titanium - 28B260CTI

CMMG Endeavor 20" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with BCG and CH - Coyote Tan - 28B3D0CCT

CMMG Dissent 16.10" Upper .22 ARC with 1:7 Twist Rate and M-LOK Rail - Rifle-Length with Charging Handle - Sniper Gray - 28B940CSG