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

Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 16in Mid-Length Barrel 1-7 Twist 15in ATLAS R-ONE Handguard A2 Flash Hider Cerakote OD Green

Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 16in Mid-Length Barrel 1-7 Twist 15in ATLAS R-ONE Handguard A2 Flash Hider Cerakote OD Green. Specifications for Aero Precision M4E1 16in 5.56 ATLAS R-ONE M-LOK Complete Upper Receiver with... ... more

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

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. Our proprietary ATLAS attachment system is a durable and dependable mounting platform maintaining a slim... ... more

Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 16in Mid-Length Barrel 1-7 Twist 15in ATLAS S-ONE Handguard A2 Flash Hider Cerakote OD Green

Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 16in Mid-Length Barrel 1-7 Twist 15in ATLAS S-ONE Handguard A2 Flash Hider Cerakote OD Green. 56 Mid Pencil Barrel w/ ATLAS S-ONE Handguard Complete Upper Receiver. These AR15 Upper Receivers... ... more

Aero Precision Complete Upper M4E1-E 5.56 20in Rifle Barrel 1/7 Twist EQ15 FDE APAR640252Q48

Aero Precision Complete Upper M4E1-E 5.56 20in Rifle Barrel 1/7 Twist EQ15 FDE APAR640252Q48. Key features include the addition of quick disconnect sling sockets enhanced milling design for grip and visual appeal and a new profile for the picatinny top... ... more

Aero Precision Complete Upper Receiver M4E1 14.7in 5.56 Mid Pencil Barrel EQ-12 HG Gen 2 Anodized Black APAR640231Q38

Aero Precision Complete Upper Receiver M4E1 14.7in 5.56 Mid Pencil Barrel EQ-12 HG Gen 2 Anodized Black APAR640231Q38. Key features include the addition of quick disconnect sling sockets enhanced milling design for grip and visual appeal and a new... ... more

Aero Precision M4E1 Enhanced Complete Upper Receiver 5.56 NATO 14.5 in Barrel Government Profile 1-7 Twist 12 in M-LOK Handguard Pinned VG6 Epsilon

Aero Precision M4E1 Enhanced Complete Upper Receiver 5.56 NATO 14.5 in Barrel Government Profile 1-7 Twist 12 in M-LOK Handguard Pinned VG6 Epsilon. Key features include the addition of quick disconnect sling sockets enhanced milling design for grip... ... more

Aero Precision AR-15 5.56x45mm NATO Complete Upper Receiver w/ No Forward Assist 16in 5.56 Mid-Length Barrel 15in M-LOK ATLAS R-ONE Handguard Anodized

Aero Precision AR-15 5.56x45mm NATO Complete Upper Receiver w/ No Forward Assist 16in 5.56 Mid-Length Barrel 15in M-LOK ATLAS R-ONE Handguard Anodized. By combining our lightest handguards and barrel profiles with the No Forward Assist Upper Receiver... ... more

Aero Precision M4E1-T SM10.3 5 Complete Upper 5.56 x 45 12.5inch Government Carbine 1-7 Twist 1/2 x 28 Thread Anodized Black APAR700103M30

Aero Precision M4E1-T SM10.3 5 Complete Upper 5.56 x 45 12.5inch Government Carbine 1-7 Twist 1/2 x 28 Thread Anodized Black APAR700103M30. 3 5.56 x 45 Complete Upper then you've found yourself in the absolute right location.. These AR15 Upper... ... more

Aero Precision M4E1-T RM10.3 Complete Upper 5.56 x 45 12.5inch Government Carbine 1-7 Twist 1/2 x 28 Thread Anodized Black APAR700703M30

Aero Precision M4E1-T RM10.3 Complete Upper 5.56 x 45 12.5inch Government Carbine 1-7 Twist 1/2 x 28 Thread Anodized Black APAR700703M30. 3 5.56 x 45 Complete Upper. Established using several of the most durable and long lasting materials in existence... ... more

Dark Storm Industries DS-15 Typhoon Complete Upper Receiver 5.56 NATO 7.5in Barrel M4 Pistol Profile 1-7 Twist 1/2x28 Thread M-Lok Firestorm Type III

Dark Storm Industries DS-15 Typhoon Complete Upper Receiver 5.56 NATO 7.5in Barrel M4 Pistol Profile 1-7 Twist 1/2x28 Thread M-Lok Firestorm Type III. 750 Micro Gas Block andPistol Gas System DSI 7.5" SOCOM 5.56 Threaded 1:7 Nitrite Barrel andDSI... ... more

Aero Precision Complete Upper Receiver M4E1-T 18in 5.56 Rifle Length Barrel 15in M-LOK ATLAS S-ONE Handguard Cerakote Flat Dark Earth APAR700315M8

Aero Precision Complete Upper Receiver M4E1-T 18in 5.56 Rifle Length Barrel 15in M-LOK ATLAS S-ONE Handguard Cerakote Flat Dark Earth APAR700315M8. The R-ONE handguards are designed with size and weight in mind while still providing plenty of... ... more

Aero Precision M4E1 Complete Upper Receiver 5.56 Mid Barrel EM-12 HG No BCG/Charging Handle Anodized Black 14.5in APAR600231M5

Aero Precision M4E1 Complete Upper Receiver 5.56 Mid Barrel EM-12 HG No BCG/Charging Handle Anodized Black 14.5in APAR600231M5. 56 Mid Barrel EM-12 HG. Formulated by using some of the most extremely robust and dependable materials in existence these... ... more

Aero Precision Complete Upper Receiver M4E1-T 14.5in 5.56 Mid Barrel 12in M-LOK ATLAS S-ONE Handguard Anodized Black APAR700304M5

Aero Precision Complete Upper Receiver M4E1-T 14.5in 5.56 Mid Barrel 12in M-LOK ATLAS S-ONE Handguard Anodized Black APAR700304M5. 5in 5.56 Mid-Length w/ ATLAS S-ONE Handguard Complete Upper Receiver with Flash Hider. Aero Precision designed these AR15... ... more

Aero Precision M4E1 Complete Upper Receiver 5.56 Barrel w/ FSB EM-7 HG No BCG/Charging Handle Anodized Black 10.5in APAR600211M3

Aero Precision M4E1 Complete Upper Receiver 5.56 Barrel w/ FSB EM-7 HG No BCG/Charging Handle Anodized Black 10.5in APAR600211M3. Key features include the addition of quick disconnect sling sockets enhanced milling design for grip and visual appeal and... ... more

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 18in 5.56 Rifle Length Barrel 15in M-LOK ATLAS S-ONE Handguard Anodized Black APAR700305M8. The R-ONE handguards are designed with size and weight in mind while still providing plenty of real-estate to... ... more

Aero Precision Complete Upper Receiver M4E1-T 5.56 16in Mid-Length Barrel 12in M-LOK ATLAS S-ONE Handguard Anodized Black APAR700304M7

Aero Precision Complete Upper Receiver M4E1-T 5.56 16in Mid-Length Barrel 12in M-LOK ATLAS S-ONE Handguard Anodized Black APAR700304M7. 56 Mid Pencil Barrel w/ ATLAS S-ONE Handguard Complete Upper Receiver. These AR15 Upper Receivers built by Aero... ... more

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 Cerakote Flat Dark Earth APAR700312M2. The R-ONE handguards are designed with size and weight in mind while still providing plenty of real-estate to... ... more

Aero Precision AR-15 5.56x45mm NATO Complete Upper Receiver w/ No Forward Assist 11.5in 5.56 Barrel 9in M-LOK ATLAS R-ONE Handguard Anodized Black

Aero Precision AR-15 5.56x45mm NATO Complete Upper Receiver w/ No Forward Assist 11.5in 5.56 Barrel 9in M-LOK ATLAS R-ONE Handguard Anodized Black. By combining our lightest handguards and barrel profiles with the No Forward Assist Upper Receiver you... ... more

Aero Precision AR-15 5.56x45mm NATO Complete Upper Receiver w/ No Forward Assist 11.5in 5.56 Barrel 9in M-LOK ATLAS S-ONE Handguard Anodized Black

Aero Precision AR-15 5.56x45mm NATO Complete Upper Receiver w/ No Forward Assist 11.5in 5.56 Barrel 9in M-LOK ATLAS S-ONE Handguard Anodized Black. By combining our lightest handguards and barrel profiles with the No Forward Assist Upper Receiver you... ... more

Aero Precision M4E1 Threaded No Forward Assist Complete Upper Receiver 10.5in 5.56 Carbine RM9.2 FDE APAR712712M2

Aero Precision M4E1 Threaded No Forward Assist Complete Upper Receiver 10.5in 5.56 Carbine RM9.2 FDE APAR712712M2. The included ATLAS R-ONE Handguard is designed with size and weight in mind while still providing plenty of real-estate to accommodate... ... more

Aero Precision M4E1 Threaded No Forward Assist Complete Upper Receiver 10.5in 5.56 Carbine SM9.2 FDE APAR712112M2

Aero Precision M4E1 Threaded No Forward Assist Complete Upper Receiver 10.5in 5.56 Carbine SM9.2 FDE APAR712112M2. The included ATLAS R-ONE Handguard is designed with size and weight in mind while still providing plenty of real-estate to accommodate... ... more

Aero Precision Complete Upper Receiver M4E1 Threaded PRO 5.56 13.7in Barrel Gov Profile Mid-Length Gas System 1-7 Twist 1/2 x 28 Thread ATLAS R-ONE

Aero Precision Complete Upper Receiver M4E1 Threaded PRO 5.56 13.7in Barrel Gov Profile Mid-Length Gas System 1-7 Twist 1/2 x 28 Thread ATLAS R-ONE. 56 Cold Hammer Forged Barrel that is paired with our PRO 5.56 BCG. Included ATLAS R-ONE Handguard... ... more

Stag Arms AR-15 Tactical Right Hand Upper Receiver 5.56 NATO 16in Barrel Hanson Profile 1-7 Twist 1/2 x 28 Thread VG6 Gamma Black STAG15100144

Stag Arms AR-15 Tactical Right Hand Upper Receiver 5.56 NATO 16in Barrel Hanson Profile 1-7 Twist 1/2 x 28 Thread VG6 Gamma Black STAG15100144. The handguard provides an uninterrupted picatinny rail along the top which allows room for sights optics and... ... more

Aero Precision M4E1-E EQ15 Complete Upper 5.56 x 45 16inch HBAR Mid Length 1-7 Twist 1/2 x 28 Thread Cerakote FDE APAR600224Q97

Aero Precision M4E1-E EQ15 Complete Upper 5.56 x 45 16inch HBAR Mid Length 1-7 Twist 1/2 x 28 Thread Cerakote FDE APAR600224Q97. 56 x 45 Complete Upper then you have arrived at the right place.. These AR15 Upper Receivers through the professional... ... more

Stag Arms AR-15 Upper Right Hand Receiver 5.56 NATO 16in Barrel M4 Profile 1-7 Twist 1/2 x 28 Thread A2 Birdcage Flash Hider Black STAG15101111

Stag Arms AR-15 Upper Right Hand Receiver 5.56 NATO 16in Barrel M4 Profile 1-7 Twist 1/2 x 28 Thread A2 Birdcage Flash Hider Black STAG15101111. Made to mil-spec standards this upper satisfies the need for a standard GI carbine. Featuring a 5.56x45mm... ... more

Stag Arms AR-15 Upper Left Hand Receiver 5.56 NATO 16in Barrel Maryland Compliant HBAR Profile 1-7 Twist 1/2 x 28 Thread A2 Birdcage Flash Hider Black

Stag Arms AR-15 Upper Left Hand Receiver 5.56 NATO 16in Barrel Maryland Compliant HBAR Profile 1-7 Twist 1/2 x 28 Thread A2 Birdcage Flash Hider Black. Made to mil-spec standards this upper satisfies the need for a standard GI carbine. Featuring a... ... more

Aero Precision Threaded Upper Receiver M4E1 5.56 11.5 inch Barrel 9 inch M-LOK ATLAS S-ONE Handguard A2 Flash Hider Flat Dark Earth APAR700312M29

Aero Precision Threaded Upper Receiver M4E1 5.56 11.5 inch Barrel 9 inch M-LOK ATLAS S-ONE Handguard A2 Flash Hider Flat Dark Earth APAR700312M29. 5in 5.56 w/ ATLAS S-ONE w/ A2 Flash Hider Handguard Complete Upper Receiver. Each of these AR15 Upper... ... more

Aero Precision Threaded Upper Receiver M4E1 5.56 11.5 inch Barrel 9 inch M-LOK ATLAS R-ONE Handguard A2 Flash Hider Flat Dark Earth APAR700712M29

Aero Precision Threaded Upper Receiver M4E1 5.56 11.5 inch Barrel 9 inch M-LOK ATLAS R-ONE Handguard A2 Flash Hider Flat Dark Earth APAR700712M29. The R-ONE line of handguards are designed with size and weight in mind providing the perfect addition to... ... more

Aero Precision Complete Upper Receiver M4E1 16in 5.56 Mid Pencil Barrel EQ-12 HG Gen 2 FDE Cerakote APAR640232Q39

Aero Precision Complete Upper Receiver M4E1 16in 5.56 Mid Pencil Barrel EQ-12 HG Gen 2 FDE Cerakote APAR640232Q39. This is a streamlined design that only needs eight screws to mount a free-floating handguard making these AR15 Upper Receivers a more... ... more

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 5.56 16in M4 Barrel 15in M-LOK ATLAS S-ONE Handguard Cerakote Flat Dark Earth APAR700315M6. Specifications for Aero Precision M4E1 16in 5.56 ATLAS S-ONE M-LOK Complete Upper Receiver with Flash Hider:... ... more

Aero Precision Complete Upper Receiver M4E1-T 5.56 16in M4 Barrel 12in M-LOK ATLAS S-ONE Handguard Anodized Black APAR700304M6

Aero Precision Complete Upper Receiver M4E1-T 5.56 16in M4 Barrel 12in M-LOK ATLAS S-ONE Handguard Anodized Black APAR700304M6. Specifications for Aero Precision M4E1 16in 5.56 ATLAS S-ONE M-LOK Complete Upper Receiver with Flash Hider: Manufacturer:... ... more

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EM-15 HG Gen 2 FDE Cerakote APAR640252M6

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EM-15 HG Gen 2 FDE Cerakote APAR640252M6. This is a streamlined design that only needs eight screws to mount a free-floating handguard making these AR15 Upper Receivers a more... ... more

Aero Precision Complete Upper Receiver M4E1 16in 5.56 Mid Pencil Barrel EM-12 HG Gen 2 Anodized Black APAR640231M39

Aero Precision Complete Upper Receiver M4E1 16in 5.56 Mid Pencil Barrel EM-12 HG Gen 2 Anodized Black APAR640231M39. This is a streamlined design that only needs eight screws to mount a free-floating handguard making these AR15 Upper Receivers a more... ... more

Aero Precision Complete Upper Receiver M4E1 16in 5.56 Mid Pencil Length Barrel EQ-15 Gen 2 Handguard Anodized Black APAR640251Q39

Aero Precision Complete Upper Receiver M4E1 16in 5.56 Mid Pencil Length Barrel EQ-15 Gen 2 Handguard Anodized Black APAR640251Q39. This is a streamlined design that only needs eight screws to mount a free-floating handguard making these AR15 Upper... ... more

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EQ-12 HG Gen 2 Anodized Black APAR640231Q6

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EQ-12 HG Gen 2 Anodized Black APAR640231Q6. This is a streamlined design that only needs eight screws to mount a free-floating handguard making these AR15 Upper Receivers a more... ... more

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EM-12 HG Gen 2 Anodized Black APAR640231M6

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EM-12 HG Gen 2 Anodized Black APAR640231M6. This is a streamlined design that only needs eight screws to mount a free-floating handguard making these AR15 Upper Receivers a more... ... more

Aero Precision Complete Upper M4E1-E 5.56 20in Rifle Barrel 1/7 Twist EQ15 Cerakote Black APAR640251Q48

Aero Precision Complete Upper M4E1-E 5.56 20in Rifle Barrel 1/7 Twist EQ15 Cerakote Black APAR640251Q48. Key features include the addition of quick disconnect sling sockets enhanced milling design for grip and visual appeal and a new profile for the... ... more