Aero Precision M4E1 Complete Upper Receiver, AR-15, 18 in Rifle Length Barrel, 15 in M-LOK Handguard, No BCH/CH, Anodized, Black, APAR640251M8

Aero Precision Complete Upper Receiver, M4E1-T, 5.56, 16In, M4 Barrel, 12in M-LOK ATLAS S-ONE Handguard, Cerakote, Flat Dark Earth, APAR700314M6

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver, 14,5In, Mid-Length Barrel, 1-7 Twist, 1/2X28 Thread, ATLAS R-ONE Handguard, W/VG6 Precision Gamma 556 SL, Black Anodized, APAR700704M5V38

Aero Precision M4E1 Threaded .223 Wylde Complete Upper Receiver, 16In, SS QPQ Mid-Length Barrel, 1-8 Twist, A2 Flash Hider, 15in M-LOK ATLAS R-ONE Handguard, Black Anodized, APAR700705M72

Aero Precision M4E1 Mid Barrel Complete Upper Receiver W/Flash Hider, AR-15, 5.56x45mm NATO, 16in Mid Length Barrel, 12in M-LOK Handguard, No BCG/CH, Magpul Cerakote, Flat Dark Earth, APAR640232M7

Aero Precision Complete Upper Receiver, M4E1-T, 5.56, 16In, M4 Barrel, 15in M-LOK ATLAS S-ONE Handguard, Cerakote, Flat Dark Earth, APAR700315M6

Aero Precision Complete Upper Receiver, M4E1-T, 18In, 5.56 Rifle Length Barrel, 15in M-LOK ATLAS S-ONE Handguard, Anodized Black, APAR700305M8

Aero Precision Complete Upper Receiver, M4E1-T, .223, 18In, Wylde Fluted Barrel, 15in M-LOK ATLAS S-ONE Handguard, Anodized Black, APAR700305M51

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 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, .223 Wylde Mid Barrel EQ-12 HG, No BCG/Charging Handle, Gen 2, Anodized Black, 16In, APAR600231Q9

Aero Precision M4E1 Complete Upper Receiver .223 Wylde Mid Barrel EM-15 HG, No BCG/Charging Handle, Gen 2, Anodized Black, 16In, APAR600251M9

Aero Precision Complete Upper Receiver, M4E1-T, 10.5In, 5.56 Barrel, 9in M-LOK ATLAS S-ONE Handguard, Cerakote, Flat Dark Earth, APAR700312M2

Aero Precision Complete Upper Receiver, M4E1-T, 10.5In, 5.56 Barrel, 9in M-LOK ATLAS S-ONE Handguard, Anodized Black, APAR700302M2

Aero Precision M4E1 Threaded Complete Upper, 7.5in 5.56 Barrel, ATLAS R-ONE 7in M-LOK HG, FDE Cerakote, APAR700711M0

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver, 14,5In, Mid-Length Barrel, 1-7 Twist, 1/2X28 Thread, ATLAS R-ONE Handguard, Black Anodized, APAR700704M5

Aero Precision M4E1 Complete Upper Receiver, AR-15, 5.56x45mm NATO, 14.5 in Mid Length Barrel, 12 in M-LOK Handguard, No BCG/CH, Magpul Cerakote, Flat Dark Earth, APAR640232M5

Aero Precision Complete Upper Receiver W/Flash Hider, M4E1, .300 Barrel EQ-9 HG, No BCG/Charging Handle, Gen 2, Anodized Black, 10In, APAR600221Q4

Aero Precision M4E1 Complete Upper Receiver, AR-15, 10.5 in Rifle Length Barrel, 9 in M-LOK Handguard, No BCH/CH, Magpul Cerakote, Flat Dark Earth, APAR640222M2

Aero Precision M4E1-E Complete Upper, 14.5in 5.56 M4 Carbine Barrel, EM-12 Handguard Gen 2, Anodized Black, APAR640231M32

Aero Precision Complete Upper Receiver, M4E1-T, 20in 5.56 Rifle Length Barrel, 15in M-LOK ATLAS S-ONE Handguard, Anodized Black, APAR700305M48

Aero Precision Complete Upper Receiver, M4E1-T, 7.5In, 5.56 Barrel, 7in M-LOK ATLAS S-ONE Handguard, Cerakote, Flat Dark Earth, APAR700311M0

Aero Precision Complete Upper Receiver, M4E1, .300 Barrel EM-7 HG, No BCG/Charging Handle, Gen 2, FDE Cerakote, 8In, APAR600212M1

Aero Precision M4E1 Complete Upper Receiver, 18In, .223 Wylde Rifle Barrel, EM-15 HG Gen 2, Anodized, Black, APAR640251M42

Aero Precision Complete Upper Receiver, M4E1, 10.5In, 5.56 Barrel W/ FSB, EM-7 HG Gen 2, FDE Cerakote, APAR640212M3

Aero Precision M4E1 Threaded Complete Upper Receiver, 5.56 NATO, 14.5 in Barrel, M4 Profile, 1-7 Twist, 1/2X28 Thread, 12 in ATLAS R-ONE M-LOK Handguard, Black, APAR700704M67

Aero Precision Complete Upper Receiver, M4E1-T, .223, 18In, Wylde Barrel, 15in M-LOK ATLAS S-ONE Handguard, Flat Dark Earth, APAR700315M42

Aero Precision Complete Upper Receiver, M4E1-E, 18In, .223 Wylde Fluted Barrel, EM-15 Handguard Gen 2 Cerakote, Flat Dark Earth, APAR640252M51

Aero Precision M4E1 Threaded .223 Wylde Complete Upper Receiver, 16In, Mid-Length Barrel, 1-8 Twist, A2 Flash Hider, ATLAS R-ONE Handguard, FDE Cerakote, APAR700715M9

Aero Precision M4E1 Complete Upper Receiver, 16In, 5.56, M4, Carbine Barrel, EQ-12 HG Gen 2, FDE Cerakote, APAR640232Q6

Aero Precision Complete Upper Receiver, M4E1-T, .223, 16In, Wylde Barrel, 12in M-LOK ATLAS S-ONE Handguard, Anodized Black, APAR700304M9

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver, 16In, Mid Length Pencil Barrel, 1-7 Twist, A2 Flash Hider, ATLAS R-ONE Handguard, Black Anodized, APAR700705M39

Aero Precision Complete Upper Receiver, M4E1-T, 14.5In, 5.56 Carbine Length Barrel, 12in M-LOK ATLAS S-ONE Handguard, Anodized Black, APAR700304M32

Aero Precision Complete Upper Receiver, M4E1-T, .300, 16In, Blackout Barrel, 15in M-LOK ATLAS S-ONE Handguard, Anodized Black, APAR700305M14

Aero Precision Complete Upper, M4E1-E, 5.56, 20In, Rifle Barrel, 1/7 Twist, EQ15, Black, APAR640251M48

Aero Precision M4E1 15in ATLAS R-ONE M-LOK Complete Upper, 16in 5.56 HBAR CMV Mid-Length Barrel, Anodized Black, Black, APAR700705M97