Black Rain Ordnance Spec15 300 Blackout 10.5 Barrel 15 Hybrid Handguard NB Bolt Complete Upper

CMMG Banshee Mk4 Suppressed Upper .300 BLK 6.5"

CMMG BANSHEE Mk4 Suppressed Upper Group .300 BLK 6.5"

Ballistic Advantage Performance Barrel 5.56x45mm 13.70", Black - Compact and Efficient Barrel - BABL556036F

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

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

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

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