5.56x45mm NATO Upper Receivers

Tapco Ejection Port Door Cover Kit for AR-15

TacFire Complete Upper 5.56 16 Barrel M-LOK Handguard

Sons of Liberty Gun Works M4-L89 Upper Receiver Group Complete Upper 5.56 16 Barrel 15 L89 Handguard

Sons Of Liberty Gun Works M4-L89 Upper Receiver Group 5.56 14.5 P&W Barrel

Colt Firearms LE6933 Complete Upper 5.56 NATO / .223 Rem 11.5 Barrel

Colt Firearms LE6920CK-NHG Upper Kit Black 5.56NATO/.223Rem 16-inch

Colt Monolithic AR-15 Pistol Complete Upper Receiver 5.56x45mm NATO 10.3" Barrel

Cobalt Kinetics CK-Pro Urg Complete Upper 5.56 13.7 Barrel

Cobalt Kinetics CK-Pro Urg Upper Stripped Upper 11.8 Handguard

Aero Precision AR-15 M4E1-E Barreled Upper Receiver 5.56x45mm NATO 14.5" Barrel 12.7" ATLAS R-ONE Handguard Black

AERO PRECISION M4E1 Threaded Complete Upper 16" 5.56 Barrel w/ 15" M-LOK ATLAS R-ONE Handguard - BLK

Radian Weapons Model 1 Upper Receiver and Hand Guard Set 15.5 in M-LOK Radian Black

Faxon Firearms ARAK21 Complete Upper Tungsten 5.56 16 Barrel

Aero Precision AR-15 Barreled Upper Receiver 5.56x45 NATO 16" Barrel

AERO PRECISION AR15 Stripped Upper Receiver FDE

Midwest Industries AR-15 Barreled Upper Receiver 223 Remington (Wylde) 16" Barrel 15" Handguard

Luth-ar A1 Ejection Port Cover Assembly 223 for AR-15

JE Machine Tech AR-15 M-LOK Handguard 12

JE Machine Ultralight Minimalists Partial Top Rail AR-15 M-LOK Handguard 10"

San Tan Tactical AR-15 Everything but the Lower Kit 5.56x45mm NATO 11.5" Barrel

VKTR Industries VK-1 5.56x45mm 16" 1:7 M-LOK Rail w/ BCG & CH, Black - V-4027-3410-001-RP

AR-STONER T-Series AR-15 Complete Upper Receiver 5.56x45mm NATO 11.5" Barrel

SONS OF LIBERTY GUN WORKS M4-L89 Upper Recvr 5.56 14.5" MidGas P/W Plan B FH

Cobalt Kinetics CK-Pro Urg Stripped Upper CK Green 6.75 Handguard