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 AR-15 Complete Upper Receiver, 5.56, Rifle Length, 20 Inch Barrel W/Pinned FSB, Magpul MOE Handguard, A2 Flash Hider, FDE Cerakote, APAR502502M66

Aero Precision AR-15 Complete Upper Receiver, 5.56, Carbine Length, 16 Inch Barrel W/Pinned FSB, Magpul MOE Handguard, A2 Flash Hider, Anodized Black, APAR502503M64

Aero Precision M5 Complete Upper Receiver, 18in .308 Rifle Barrel, W/ATLAS S-ONE 15in M-LOK Handguard, Anodized, Flat Dark Earth, APAR538115M25

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 Complete Upper Receiver, M4E1, .300 Barrel EQ-7 HG, No BCG/Charging Handle, Gen 2, FDE Cerakote, 8In, APAR600212Q1

Aero Precision M4E1 Complete Upper Receiver, AR-15, 10.5 in Rifle Length Barrel, 9 in Quad Rail Handguard, No BCH/CH, Magpul Cerakote, Flat Dark Earth, APAR640222Q2

Aero Precision M4E1 Threaded Complete Upper Receiver, 5.56, 11.5In, Carbine Length, 1-7 Twist, 10.3in ATLAS S-ONE Handguard, A2 Flash Hider, Cerakote, OD Green, APAR700389M29

Aero Precision Complete Upper Receiver, M4E1-T, 14.5In, 5.56 Carbine Length Barrel, 12in M-LOK ATLAS S-ONE Handguard, Flat Dark Earth, APAR700314M32

Aero Precision Complete Upper Receiver, M4E1-T, .223, 16In, Wylde Fluted Barrel, 15in M-LOK ATLAS S-ONE Handguard, Cerakote, Flat Dark Earth, APAR700315M50

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

Aero Precision Complete Upper, M4E1-T, .350 Legend, 16In, RM16.6 Anodized, Black, APAR700705M101

Aero Precision M5 Complete Upper Receiver, 16in .308 Mid Barrel, W/ATLAS R-ONE 12in M-LOK Handguard, Anodized, Black, APAR538704M22

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

Luth-AR Complete Upper Receiver Assembly, .223, 26In, 16In, Bull, Carbine, 1X9, 1/2X28, Picatinny, Key MOD, A2 Flash Hider, Anodized, Manganese Phosphate, Silver/ Black, FTBL-B16

Aero Precision M4E1 Enhanced No Forward Assist Complete Upper Receiver, 10.5in 5.56 Carbine, EM-9.3, FDE, APAR612276M2

Aero Precision M5 Complete Upper Receiver, 16in .308 Mid SS Barrel, W/ATLAS R-ONE 12in M-LOK Handguard, Anodized, Flat Dark Earth, APAR538714M23

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