Tiger Rock Complete Upper Receiver AR-15 5.56 NATO 16in Mid Length 1-7 Twist w/ 16in Keymod Handguard Black Large UB15-FKM16

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

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

Wilson Combat Upper Complete Forged 5.56 NATO Protector Mid Length 16in Round Q-Comp 1-8 Twist Black Without Forward Assist Black TR-UFW556LEM16RQ8B

Wilson Combat Upper Complete Forged 5.56 NATO Protector Mid Length 16in Round Q-Comp 1-8 Twist Black Without Forward Assist Black TR-UFW556LEM16RQ8B. Complete High Performance AR Upper Receiver Units use the same top tier components skilled gunsmith... ... more

Stag Arms AR-15 Retro Right Hand Upper Receiver 5.56 NATO 20in Barrel NJ Compliant GOV Profile 1-7 Twist 1/2 x 28 Thread Compensator Black

Stag Arms AR-15 Retro Right Hand Upper Receiver 5.56 NATO 20in Barrel NJ Compliant GOV Profile 1-7 Twist 1/2 x 28 Thread Compensator Black. Made to mil-spec standards with a removable A3 carry handle and a rifle length thermoplastic handguard with... ... 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

Airborne Arms Hyperion Series Barrel AR-15 16in Mid Length .750 Gas Block 5.56 NATO 1/2x28 Thread 1-8 Twist 416R Steel Silver Medium ABN-AAHB-W16R

Airborne Arms Hyperion Series Barrel AR-15 16in Mid Length .750 Gas Block 5.56 NATO 1/2x28 Thread 1-8 Twist 416R Steel Silver Medium ABN-AAHB-W16R. Airborne Arms crafted these Rifle Barrels from 416R stainless steel for maximum ruggedness. Each... ... more

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 S-ONE M-LOK

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 S-ONE M-LOK. Our proprietary ATLAS attachment system is a durable and dependable mounting platform maintaining a slim... ... more

Aero Precision Complete Upper Receiver M4E1-T 5.56 16in Mid-Length Barrel 15in M-LOK ATLAS S-ONE Handguard Cerakote Flat Dark Earth APAR700315M7

Aero Precision Complete Upper Receiver M4E1-T 5.56 16in Mid-Length Barrel 15in M-LOK ATLAS S-ONE Handguard Cerakote Flat Dark Earth APAR700315M7. 56 Mid Pencil Barrel w/ ATLAS S-ONE Handguard Complete Upper Receiver. These AR15 Upper Receivers built by... ... more

Aero Precision M4E1-T SM15 PRO Complete Upper 5.56 x 45 16.3inch Mid Length 1-7 Twist 1/2 x 28 Thread Anodized Kodiak Brown APUG700392M103-1

Aero Precision M4E1-T SM15 PRO Complete Upper 5.56 x 45 16.3inch Mid Length 1-7 Twist 1/2 x 28 Thread Anodized Kodiak Brown APUG700392M103-1. 56 Cold Hammer Forged Barrel that is paired with our PRO 5.56 BCG. Included ATLAS R-ONE Handguard BREACH... ... more

Aero Precision Complete Upper Receiver M4E1-E 16in 5.56 Mid Barrel Quantum 15in M-LOK Handguard Anodized Black APAR640105M7

Aero Precision Complete Upper Receiver M4E1-E 16in 5.56 Mid Barrel Quantum 15in M-LOK Handguard Anodized Black APAR640105M7. These AR15 Upper Receivers by Aero Precision are designed for M4E1 spec receivers and are precision machined. This Aero... ... more

Aagil Arms Complete AR-15 5.56 NATO Upper Assembly 16in Barrel Length Carbine 1-8 Twist w/ 15in Key Mod Anodized Black Medium AA-C16556C7D15

Aagil Arms Complete AR-15 5.56 NATO Upper Assembly 16in Barrel Length Carbine 1-8 Twist w/ 15in Key Mod Anodized Black Medium AA-C16556C7D15. Built upon the classic AR-15 platform these complete upper assemblies are machined to precision and include... ... more

Aero Precision M4E1 Enhanced No Forward Assist Complete Upper Receiver 16in 5.56 Mid EM15 FDE APAR612294M7

Aero Precision M4E1 Enhanced No Forward Assist Complete Upper Receiver 16in 5.56 Mid EM15 FDE APAR612294M7. The M4E1 Enhanced Upper Receiver is a one-piece design combining the handguard mounting platform with the upper receiver itself. Through... ... more

Aero Precision Complete Upper Receiver M4E1 16in 5.56 Mid Pencil Barrel EM-12 HG Gen 2 FDE Cerakote APAR640232M39

Aero Precision Complete Upper Receiver M4E1 16in 5.56 Mid Pencil Barrel EM-12 HG Gen 2 FDE Cerakote APAR640232M39. 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 Threaded No Forward Assist Complete Upper Receiver 16in 5.56 Mid SM15 FDE APAR712115M7

Aero Precision M4E1 Threaded No Forward Assist Complete Upper Receiver 16in 5.56 Mid SM15 FDE APAR712115M7. The M4E1 Enhanced Upper Receiver is a one-piece design combining the handguard mounting platform with the upper receiver itself. Through... ... more

Stag Arms AR-15 Tactical Right Hand Upper Receiver 5.56 NATO 10.5in Barrel GOV-CMV Profile 1-7 Twist 1/2 x 28 Thread VG6 Delta FDE STAG15101722

Stag Arms AR-15 Tactical Right Hand Upper Receiver 5.56 NATO 10.5in Barrel GOV-CMV Profile 1-7 Twist 1/2 x 28 Thread VG6 Delta FDE STAG15101722. The handguard provides an uninterrupted picatinny rail along the top which allows room for sights optics... ... more

Stag Arms AR-15 Tactical Right Hand Upper Receiver 5.56 NATO 7.5in Barrel GOV-CMV Profile 1-7 Twist 1/2 x 28 Thread VG6 Delta Nitride FDE STAG15101922

Stag Arms AR-15 Tactical Right Hand Upper Receiver 5.56 NATO 7.5in Barrel GOV-CMV Profile 1-7 Twist 1/2 x 28 Thread VG6 Delta Nitride FDE STAG15101922. The handguard provides an uninterrupted picatinny rail along the top which allows room for sights... ... more

Stag Arms AR-15 Tactical Right Hand Upper Receiver 5.56 NATO 7.5in Barrel GOV-CMV Profile 1-7 Twist 1/2 x 28 Thread VG6 Delta Chromephos FDE

Stag Arms AR-15 Tactical Right Hand Upper Receiver 5.56 NATO 7.5in Barrel GOV-CMV Profile 1-7 Twist 1/2 x 28 Thread VG6 Delta Chromephos FDE. The handguard provides an uninterrupted picatinny rail along the top which allows room for sights optics and... ... more

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

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

Aero Precision Complete Upper Receiver M4E1 16in 5.56 Mid Pencil Barrel EQ-15 HG Gen 2 FDE Cerakote APAR640252Q39

Aero Precision Complete Upper Receiver M4E1 16in 5.56 Mid Pencil Barrel EQ-15 HG Gen 2 FDE Cerakote APAR640252Q39. 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 Mid Barrel Complete Upper Receiver w/Flash Hider AR-15 5.56x45mm NATO 16in Mid Length Barrel 15in Quad Rail Handguard No BCG/CH

Aero Precision M4E1 Mid Barrel Complete Upper Receiver w/Flash Hider AR-15 5.56x45mm NATO 16in Mid Length Barrel 15in Quad Rail Handguard No BCG/CH. 56 Mid Barrel Complete Upper Receiver with Flash Hider is an amazing option. Designed to give you the... ... more

AIM Sports Inc Complete AR Pistol Upper Receiver w/ BCG 5.56 NATO 10.5in Barrel M4 Profile Carbine 1-8 Twist 1/2x28 Thread 10M-LOK Free Float

AIM Sports Inc Complete AR Pistol Upper Receiver w/ BCG 5.56 NATO 10.5in Barrel M4 Profile Carbine 1-8 Twist 1/2x28 Thread 10M-LOK Free Float. . Developed by using several of the most extremely heavy duty and dependable resources in existence these... ... more

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

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. 56 Mid Barrel Complete Upper Receiver with Flash Hider is an amazing option. Designed to give you... ... more

Aero Precision M4E1 Mid Barrel Complete Upper Receiver w/Flash Hider AR-15 5.56x45mm NATO 16in Mid Length Barrel 15in M-LOK Handguard No BCG/CH Magpul

Aero Precision M4E1 Mid Barrel Complete Upper Receiver w/Flash Hider AR-15 5.56x45mm NATO 16in Mid Length Barrel 15in M-LOK Handguard No BCG/CH Magpul. 56 Mid Barrel Complete Upper Receiver with Flash Hider is an amazing option. Designed to give you... ... more

Aero Precision M4E1 Enhanced No Forward Assist Complete Upper Receiver 16in 5.56 Mid EM15 Anodized Black APAR612218M7

Aero Precision M4E1 Enhanced No Forward Assist Complete Upper Receiver 16in 5.56 Mid EM15 Anodized Black APAR612218M7. The M4E1 Enhanced Upper Receiver is a one-piece design combining the handguard mounting platform with the upper receiver itself.... ... more

Aero Precision M4E1 15in Enhanced M-LOK Complete Upper 16in 5.56 HBAR CMV Mid-Length Barrel Anodized Black APAR600218M97

Aero Precision M4E1 15in Enhanced M-LOK Complete Upper 16in 5.56 HBAR CMV Mid-Length Barrel Anodized Black APAR600218M97. This is a streamlined design that only needs eight screws to mount a free-floating handguard making these AR15 Upper Receivers a... ... more

Stag Arms AR-15 Tactical Upper Receiver 5.56x45mm NATO 16in Barrel Hanson Profile 1-7 Twist 1/2x28 Left Hand VG6 Gamma Black STAG15110144

Stag Arms AR-15 Tactical Upper Receiver 5.56x45mm NATO 16in Barrel Hanson Profile 1-7 Twist 1/2x28 Left Hand VG6 Gamma Black STAG15110144. The handguard provides an uninterrupted picatinny rail along the top which allows room for sights optics and... ... more

Aagil Arms Complete AR-15 5.56 NATO Upper Assembly 16in Barrel Length Carbine 1-7 Twist w/ 15in Clamp on Key Mod Cerakote Olive Drab Green Medium

Aagil Arms Complete AR-15 5.56 NATO Upper Assembly 16in Barrel Length Carbine 1-7 Twist w/ 15in Clamp on Key Mod Cerakote Olive Drab Green Medium. It is assembled with a carbine length gas system and a mid-length gas system. It has a carbine length gas... ... more

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

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

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

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. 56 Mid Barrel Complete Upper Receiver with Flash Hider is an amazing option. Designed to give you the full... ... more

Aero Precision M4E1-T SM15 Complete Upper 5.56 x 45 16inch HBAR Mid Length 1-7 Twist 1/2 x 28 Thread Cerakote FDE APAR700115M97

Aero Precision M4E1-T SM15 Complete Upper 5.56 x 45 16inch HBAR Mid Length 1-7 Twist 1/2 x 28 Thread Cerakote FDE APAR700115M97. Specifications for Aero Precision M4E1-T SM15 5.56 x 45 Complete Upper: Manufacturer: Aero Precision Cartridge: 5.56x45mm... ... more

Aero Precision M4E1 Threaded No Forward Assist Complete Upper Receiver 16in 5.56 Mid RM15 FDE APAR712715M7

Aero Precision M4E1 Threaded No Forward Assist Complete Upper Receiver 16in 5.56 Mid RM15 FDE APAR712715M7. The M4E1 Enhanced Upper Receiver is a one-piece design combining the handguard mounting platform with the upper receiver itself. Through... ... more

Jacob Grey Firearms Complete Upper Assembly 5.56 NATO 13in 1-7 Twist 1/2x28 Thread Black 556N13CUA

Jacob Grey Firearms Complete Upper Assembly 5.56 NATO 13in 1-7 Twist 1/2x28 Thread Black 556N13CUA. 56 NATO and built around a 1/7 twist barrel. 7-sided M-LOK Handguard and 7075 Aluminum Upper Receiver. These uppers have a pistol-length gas system that... ... more

Aagil Arms Complete AR-15 5.56 NATO Upper Assembly 16in Stainless Steel Length Carbine 1-8 Twist w/ 15in MLOK Anodized Black Medium AA-C16S556C8K15

Aagil Arms Complete AR-15 5.56 NATO Upper Assembly 16in Stainless Steel Length Carbine 1-8 Twist w/ 15in MLOK Anodized Black Medium AA-C16S556C8K15. 5.56 NATO. 16" Stainless Steel Barrel. Carbine Gas System. 15" M-Lok Handguard. Charging Handle and... ... more

Wilson Combat Upper Complete Forged 5.56 NATO Recon Mid Length 16in Round Q-Comp 1-8 Twist Black Black TR-UF556RCM16RQ8B

Wilson Combat Upper Complete Forged 5.56 NATO Recon Mid Length 16in Round Q-Comp 1-8 Twist Black Black TR-UF556RCM16RQ8B. Complete High Performance AR Upper Receiver Units use the same top tier components skilled gunsmith assembly and final finishing... ... more

Aagil Arms Complete AR-15 5.56 NATO Upper Assembly 16in Stainless Steel Length Carbine 1-8 Twist w/ 15in Key Mod Anodized Black Medium AA-C16S556C8D15

Aagil Arms Complete AR-15 5.56 NATO Upper Assembly 16in Stainless Steel Length Carbine 1-8 Twist w/ 15in Key Mod Anodized Black Medium AA-C16S556C8D15. 56 NATO Upper Assembly 16in Stainless Steel Length Carbine w/ 15in Key Mod. These AR15 Upper... ... more

Stag Arms AR-15 Tactical Left Hand Upper Receiver 5.56 NATO 16in Barrel Hanson Profile 1-7 Twist 1/2 x 28 Thread VG6 Delta Nitride Black STAG15110142

Stag Arms AR-15 Tactical Left Hand Upper Receiver 5.56 NATO 16in Barrel Hanson Profile 1-7 Twist 1/2 x 28 Thread VG6 Delta Nitride Black STAG15110142. The handguard provides an uninterrupted picatinny rail along the top which allows room for sights... ... more

Stag Arms AR-15 Tactical Right Hand Upper Receiver 5.56 NATO 16in Barrel Maryland Compliant Hanson Profile 1-7 Twist 1/2 x 28 Thread VG6 Delta Nitride

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