5.56x45mm NATO Receiver Parts

Ke-15 Upper Reciever W/ Forward Assist & Dust Cover - Ke-15 Upper Reciever W/ Forward Assist & Dust Cover 5.56mm

Ke-15 Stripped Upper Receiver 5.56mm

Ar-15 Blem Super Duty Stripped Receiver Sets - Ar-15 Blemished Super Duty Receiver Set 5.56mm Luna Black

Mike-102 Gen 2 Complete Uppers - Gen 2 Complete Upper 9'''' Pistol Length W/Blast Diverter

Mike-102 Gen 2 Complete Uppers - Gen 2 Complete Upper 16'''' Intermediate Gas W/A2 Flash Hider

Ar-15 Le6960-Ccu Upper Receiver 5.56 M-Lok - Le6960-Ccu Upper Receiver 5.56 M-Lok Black

M4 Upper Receiver 5.56 Socom Barrel - M4 Socom Upper Group 14.5in Stripped

Mil-Sport Ar15 Stripped Upper Receiver - Mil Sport Ar-15 Stripped Upper Receiver 16'''' Bbl Black

Ar-15 Stripped Upper Receivers - Ar-15 Stripped Upper Receiver No Auto Sear/Forward Assist

Ar-15 Upper Receiver Assembled No Auto Sear Cut - 5.56mm Assembled Upper Rcvr No Auto Sear Cut For Ar-15 Fde

M4e1 Superlative Arms Piston Complete Upper Receiver Groups - Piston Upper 10.5'''' Barrel 9'''' Handguard Blk