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Wolf Performance A1 Complete Upper 12.5" 5.56 NATO 1:7 Piston Driven
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Wolf Performance A1 Complete Upper 14.5" 5.56 NATO 1:7 Piston Driven
Wolf Performance A1 Complete Upper 16" 5.56 NATO 1:7 Piston Driven
Colt Defense Un-issued Prototype IAR (Infantry Assault Rifle) Upper Receiver W/ Knights Armament Flip-up Sights - 16&quo
Aero Precision M4E1 Threaded 10.5" 5.56 No Forward Assist Complete Upper Receiver w/ 9.2" M-LOK ATLAS R-ONE Ha
Bushmaster 0040017BLK QRC Complete Upper 5.56x45mm NATO 16" CMV Nitride Barrel, Black, Flat Top Aluminum Rec, A2 Fl