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Aero Precision
Aero Precision AR15 Complete Upper, 16in 5.56 M4 Carbine Barrel w/ Pinned FSB, M4 Handguard ,Includes BCG & CH, Anodized Black, APAR505721
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Aero Precision
Aero Precision M4E1-T Complete Upper Receiver, .223 Wylde, 16in, Mid Length, R-One M-LOK Handguard, QPQ, Black, APAR712705M88
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Rock River Arms
Rock River Arms Completed Pistol Upper Receiver, A4 .223/5.56mm, 20 Inch Barrel, Standart Profile, 1-9 Twist, 1/2-28 Thread, A2 Handguard, A2 Flash Hider w/Gas Block, Black, AR0450B
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Rock River Arms
Rock River Arms Completed Pistol Upper Receiver, A4 .223/5.56mm, 16 Inch Barrel, Mid-Length Profile, 1-9 Twist, 1/2-28 Thread, A2 Flash Hider, Black, AR0375B
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Aero Precision
Aero Precision M4E1-T Complete Upper Receiver, .223 Wylde, 16in, Mid Length, S-One M-LOK Handguard, QPQ, Black, APAR712105M88
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Lead & Steel
Lead & Steel JAG 5.56mm 16in Upper Receiver Group, Mid Length, 1-7 Twist, Flash Hider, Earth, 120723
Upper Receiver$480