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Aero Precision - M4E1 No Forward Assist Assembled Upper Receiver - 16" Barrel - .223/5.56 - APAR612218M7
Aero Precision M4E1 Enhanced 18" .223 Wylde SS QPQ Complete Upper Receiver with 16.6" Enhanced M-LOK Handguard
Aero Precision - M4E1 Complete Upper Receiver - 16" Barrel - .223/5.56 - APAR712705M7
Aero Precision M4E1 Enhanced 14.5" 5.56 M4 Carbine Length Barrel Complete Upper Receiver - Anodized Black - APAR640
Aero Precision M4E1 Threaded 16" 5.56x45mm Mid-Length Complete Upper Receiver with ATLAS R-ONE Handguard - OD Green
Aero Precision M5 Complete Upper with 18" .308 Rifle Length Barrel, Adjustable Gas Block & 15" ATLAS S-ONE
Aero Precision M4E1 Threaded 16" 5.56x45mm Mid-Length Complete Upper Receiver with ATALS R-ONE Handguard - Kodiak B
Aero Precision M5 16" .308 CMV Complete Upper Receiver with ATLAS R-ONE Handguard - OD Green Anodized - APAR538772M
Aero Precision M5 16" .308 CMV Complete Upper Receiver with ATLAS R-ONE Handguard - Kodiak Brown Anodized - APAR538
Aero Precision M5 20" .308 CMV Complete Upper Receiver with 15" ATLAS R-ONE Handguard - OD Green Anodized - AP
Aero Precision M5 Complete Upper with 16" .308 Mid-Length Barrel, Adjustable Gas Block, & 15" ATLAS R-ONE