Lewis Machine and Tool MRP-L Stripped AR-15 Upper Receiver - 9.25" - M-LOK Handguard - Grey

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

RADIAN WEAPONS Model 1 14in Radian Gray Upper and Handguard Set (R0625)

RADIAN WEAPONS Model 1 14in FDE Upper and Handguard Set (R0627)

BATTLE ARMS Authority ELite Upper Recv 5.56 10.5" AR-15 Gray

AERO PRECISION M5 20" .308 CMV Complete Upper Receiver w/ ATLAS S-ONE M-Lok 15" Handguard

BUSHMASTER M4 Type Patrolman Flat Top A4 Upper 5.56 16" Black

AERO PRECISION AR15 5.56 NATO / 223 Rem 20" Complete Upper Receiver w/ Carry Handle | Black