Shop 4,476 Deals on Upper Receivers

Primary Weapons Systems MK116 Pro Upper 223 Wylde/556NATO 16.1" Barrel, Black - 19-PM116UA0B

ZevTech .223 Rem/5.56 Upper Receiver, Hardcoat Anodized Black - UR-556-FOR

Tacfire 7" Complete Upper Assembly 9mm 1:10, Black - BU-9MM-7

Tacfire 16" Complete Upper Assembly 5.56x45mm 1:8, Black - BU-556-16

Angstadt Arms Upper 9mm with 6" Barrel, Black - AAUT109006

Q LLC Sugar Weasel .300 AAC Blackout Upper with 13" Barrel, Black, Tan - ACCSW30013INUPPER

Del-Ton Inc 16" M4 Carbine Rifle Kit 5.56x45mm 1:9, Black - RKT100

Del-Ton Inc 16" Heavy Mid Length Rifle Kit 5.56x45mm 1:9, Black - RKT104

Patriot Ordnance Factory P415 Edge 10.5" Complete Upper .300 AAC Blackout, Black - 1515

CMMG Dissent 6.50" Upper 5.7x28mm with 1:9 Twist Rate and M-LOK Rail - Pistol-Length with Charging Handle - Armor Black - 57BA8AEAB

CMMG Resolute MK4 .350 Legend Upper with 16.1" Barrel, Black - 35B5FBCAB

CMMG Resolute MK4 6mm ARC Upper with 16.1" Barrel, Black - 60B1091AB

CMMG Banshee 8" Upper 9mm with 1:10 Twist Rate and M-LOK Rail - Armor Black Upper Assembly with BCG and CH - 99B518DAB

Tacfire 18" Complete Upper Assembly .308 Win 1:10, Black - BU-308-18

Tacfire 10" Complete Upper Assembly .300 AAC Blackout 1:8, Black - BU-300-10

Tacfire 7" Complete Upper Assembly 5.56x45mm 1:8, Black - BU-556-7

Tacfire 16" Complete Upper Assembly 9mm 1:10, Black - BU-9MM-16

Tacfire Upper 5.56x45mm, Black Anodized - UP01C2

Tacfire 5" Complete Upper Assembly 5.56x45mm 1:5, Black - BU-556-5

LanTac SF15 Reacon AR-15 Complete Upper Receiver, 223 Wylde, 16" Barrel, Black

Bushmaster A3 Patrolman .223 Rem/5.56 16" Barrel Flat-Top Complete Upper Assembly - 91822

Radian Weapons Model 1 MOE Upper M-LOK Rail with Charging Handle, Flat Dark Earth - Rugged Reliability - R0430

Stern Defense 8.50" Classic Upper 9mm 1:10 Free Float M-LOK Rail, Black

Aero Precision M4E1 Standard Upper Receiver Stripped AR-15 No Forward Assist Aluminum Black