Aero Precision Complete Upper Receiver, M4E1-T, RM12.7, 5.56x45mm NATO, 13.9In, Government, Mid Length, 1 in 7, 1/2 X 28, 12.7In, A2 Flash Hider, Cerakote, FDE, APAR700714M99

Aero Precision M4E1 Threaded Complete Upper, 7.5in 5.56 Barrel, ATLAS R-ONE 7in M-LOK HG, Anodized Black, APAR700701M0

Aero Precision Complete Upper Receiver, M4E1-T, 5.56x45mm NATO, 18In, Government, Rifle Length, 1 in 7, 1/2 X 28, 15In, A2 Flash Hider, Cerakote, FDE, APAR700715M8

Aero Precision M4E1 Upper Receiver, AR-15, 5.56x45mm NATO, 7 in M-LOK Handguard, No BCG/Charging Handle, Magpul Cerakote, Flat Dark Earth, APAR640212M0

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver, 14,5In, Mid-Length Barrel, 1-7 Twist, 1/2X28 Thread, ATLAS R-ONE Handguard, FDE Cerakote, APAR700714M5

Aero Precision Complete Upper Receiver, M4E1, .300 Barrel EM-7 HG, No BCG/Charging Handle, Gen 2, Anodized Black, 8In, APAR600211M1

Aero Precision Complete Upper Receiver, M4E1-T, 5.56x45mm NATO, 16In, Government, Mid Length, 1 in 7, 1/2 X 28, 12.7In, A2 Flash Hider, Cerakote, FDE, APAR700714M7

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver, 10,5In, M4 Barrel, 1-7 Twist, A2 Flash Hider, ATLAS R-ONE Handguard, FDE Cerakote, APAR700712M2

Aero Precision Complete Upper Receiver, M4E1-T, SM-15, 5.56x45mm NATO, 16In, Government, Mid Length, 1 in 7, 1/2 X 28, 15In, A2 Flash Hider, Anodized, Kodiak Brown, APAR700392M7

Aero Precision M5E1 18in .308 win/7.62x51mm NATO 4150 Chrome Moly V Complete Upper Receiver

Aero Precision M4E1 Threaded Complete Upper Receiver, 5.56 NATO, 14.5 in Barrel, Government Profile, 1-7 Twist, 1/2X28 Thread, 12 in ATLAS R-ONE M-LOK Handguard, Black, APAR700704M68

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver, 10,5In, M4 Barrel, 1-7 Twist, A2 Flash Hider, ATLAS R-ONE Handguard, Black Anodized, APAR700702M2

Aero Precision M5 Complete Upper Receiver, 20in 6.5 Creedmoor SS Rifle Barrel, W/ATLAS S-ONE 15in M-LOK Handguard, Anodized, Flat Dark Earth, APAR538115M45

Aero Precision M4E1-T RM15 Complete Upper, 5.56 X 45, 16Inch, HBAR, Mid Length, 1-7 Twist, 1/2 X 28 Thread, Cerakote,, FDE, APAR700715M97

Aero Precision M4E1 Threaded .300 Blackout Complete Upper Receiver, 10In, 1-7 Twist, 5/8X24 Thread, ATLAS R-ONE Handguard, FDE Cerakote, APAR700712M4

Aero Precision Complete Upper Receiver, M4E1-T, 5.56x45mm NATO, 16In, Government, Carbine Length, 1 in 7, 1/2 X 28, 12.7In, A2 Flash Hider, Anodized, Black, APAR700704M6

Aero Precision M4E1-E EQ15 Complete Upper, 5.56 X 45, 16Inch, HBAR, Mid Length, 1-7 Twist, 1/2 X 28 Thread, Anodized, Black, APAR600206Q97

Aero Precision Complete Upper Receiver, M5E1, 20In, 6.5 cm SS Rifle Barrel, EM-15 HG Gen 2, FDE, APAR308556M45

Aero Precision Complete Upper, M4E1-T, 5.56, 8In, Pistol Barrel, SM7.3 Anodized, Black, APAR700101M102

Grid Defense Complete Upper Receiver, 5.56Mm, 7.5 Inch, Pistol Length, 4150 M4 Barrel, 1-7 Twist, 9 Inch Octagon M-LOK Rail, Dimpled Flash Can, Tactical Grape, GD75GDR9FCAN556GRP

Aero Precision M4E1-T RM10.3 Complete Upper, 5.56 X 45, 12.5Inch, Government, Carbine, 1-7 Twist, 1/2 X 28 Thread, Cerakote, FDE, APAR700713M30