Rainier Arms Gen 2 Forged A4 Upper Receiver AR-15 Black RA-A4-UR-G2

Foxtrot Mike Products Ar-15 Mike-15 Gen 2 Upper Receiver Assembly 223 Wylde - Ar-15 16" Upper Receiv

The Mike-15 Upper Receiver incorporates several novel and patent pending ideas into one of the most innovated AR-15 uppers on the market. The integrated, proprietary recoil system allows for the upper to function without the need for a lower with a... ... more

Grey Ghost Precision Ar-15 Forged Upper Receiver - Ar-15 Stripped Forged Upper Receiver Black

Cornerstone Lower fans have been asking for years now; "Does GGP make a forged upper with the same gorgeous anodizing and tight fit as their lower?" Ask and ye shall receive! Finally, you can grab what Grey Ghost Precision considers the best forged... ... more

Zro Delta Ar-15 Forged M4 Upper Receiver 5.56mm - Ar-15 Forged M4 Stripped Upper Receiver

Forged M4 Upper Receiver with all the features you need. ZRODelta supplies this M4 upper with a matte black hardcoat anodizing. All receivers feature M4 feedramps. The 7075 forging is machined to the standard M4 or AR-15 contours. Includes... ... 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

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

Alexander Arms Tactical Upper Receiver AR-15 6.5mm Grendel 18 inch Barrel 1-8 Twist 5/8x24 Thread A2 Flash Hider Black Anodized UTA-65-10RD

Alexander Arms Tactical Upper Receiver AR-15 6.5mm Grendel 18 inch Barrel 1-8 Twist 5/8x24 Thread A2 Flash Hider Black Anodized UTA-65-10RD. Specifications for Alexander Arms AR-15 6.5mm Grendel Tactical Upper Receiver: Manufacturer: Alexander Arms... ... more

Rock River Arms Completed Upper Receiver Elite Carbine A4 .223/5.56mm 16 Inch Barrel 1-9 Twist Mid-Length Profile 1/2-28 Thread A2 Flash Hider Black

Rock River Arms Completed Upper Receiver Elite Carbine A4 .223/5.56mm 16 Inch Barrel 1-9 Twist Mid-Length Profile 1/2-28 Thread A2 Flash Hider Black. 223/5.56mm Completed Upper then you have arrived at the right spot.. These AR15 Upper Receivers... ... more

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 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

Rainier Arms Ruc Pro Mk1 5.56 Nato Partial Upper Receiver Black 12.5 in RA-MK1-12.5-PU-BLK

Rainier Arms Ruc Pro Mk1 5.56 Nato Partial Upper Receiver Black 12.5 in RA-MK1-12.5-PU-BLK. Bringing the highest quality parts to the market while offering the best value as well. This partial upper utilizes a Rainier Arms Low Pro nonadjustable gas... ... more

Rock River Arms Completed Upper Receiver A4 9MM Luger 7 Inch Barrel 1-10 Twist 1/2-36 Thread Free-Float Handguard A2 Flash Hider Black 9MM0365B

Rock River Arms Completed Upper Receiver A4 9MM Luger 7 Inch Barrel 1-10 Twist 1/2-36 Thread Free-Float Handguard A2 Flash Hider Black 9MM0365B. . Formulated working with several of the very most robust and dependable materials available these AR15... ... more

Rock River Arms Upper Receiver A4 .223 Wylde 16 Inch Barrel Varmint Profile 1-8 Twist Free-Float Handguard Black AR0500

Rock River Arms Upper Receiver A4 .223 Wylde 16 Inch Barrel Varmint Profile 1-8 Twist Free-Float Handguard Black AR0500. 223 Wylde Completed Upper was created to be the ideally suited product for anybody looking for an outstanding option.. These AR15... ... more

Rock River Arms Completed Pistol Upper Receiver A4 .223/5.56mm 16 Inch Barrel Mid-Length Profile 1-9 Twist 1/2-28 Thread A2 Flash Hider Black AR0375B

Rock River Arms Completed Pistol Upper Receiver A4 .223/5.56mm 16 Inch Barrel Mid-Length Profile 1-9 Twist 1/2-28 Thread A2 Flash Hider Black AR0375B. 223/5.56mm Completed Pistol Upper. These AR15 Upper Receivers through the skilled product... ... more

Rock River Arms Completed Upper Receiver A4 9MM Luger 16 Inch Barrel 1-10 Twist 1/2-36 Thread Free-Float Handguard Brake Black 9MM0700.V1

Rock River Arms Completed Upper Receiver A4 9MM Luger 16 Inch Barrel 1-10 Twist 1/2-36 Thread Free-Float Handguard Brake Black 9MM0700.V1. . Formulated working with several of the very most robust and dependable materials available these AR15 Upper... ... more

Rock River Arms Completed Upper Receiver A4 9MM Luger 10.5 Inch Barrel 1-10 Twist 1/2-36 Thread R4 Handguard A2 Flash Hider Black 9MM0364B

Rock River Arms Completed Upper Receiver A4 9MM Luger 10.5 Inch Barrel 1-10 Twist 1/2-36 Thread R4 Handguard A2 Flash Hider Black 9MM0364B. . Formulated working with several of the very most robust and dependable materials available these AR15 Upper... ... more

Rainier Arms Ruc Pro Mk1 5.56 Nato Partial Upper Receiver Black 16 in RA-MK1-16-PU-BLK

Rainier Arms Ruc Pro Mk1 5.56 Nato Partial Upper Receiver Black 16 in RA-MK1-16-PU-BLK. Bringing the highest quality parts to the market while offering the best value as well. This partial upper utilizes a Rainier Arms Low Pro nonadjustable gas block... ... more

Rainier Arms MK12 223 Wylde Partial Upper Receiver Black 18 in RA-MK12-DI-18R-PU

Rainier Arms MK12 223 Wylde Partial Upper Receiver Black 18 in RA-MK12-DI-18R-PU. Bringing the highest quality parts to the market while offering the best value as well. This partial upper build utilizes a Precision Reflex GEN III free float handguard... ... more

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 .300 Barrel EM-7 HG No BCG/Charging Handle Gen 2 Anodized Black 8in APAR600211M1. 300 Blackout Barrels are equipped with Chrome Moly Vanadium barrels. Along with solid fit and finish these AR15 Upper... ... 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

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

3rd Gen Tactical AR-15 Complete Upper Pistol Assembly with 10.5in Barrel Curved Upper and 9.75in Curved Handguard. Black 3GTS-46

3rd Gen Tactical AR-15 Complete Upper Pistol Assembly with 10.5in Barrel Curved Upper and 9.75in Curved Handguard. Black 3GTS-46. The expertly crafted 3rd Gen Tactical AR15 Upper Pistol Assembly comes with an upper receiver that is chambered in .223... ... more

Rainier Arms RUC DI 5.56 Nato Partial Upper Receiver Black 10.5 in RA-RUC-DI-10C-PU

Rainier Arms RUC DI 5.56 Nato Partial Upper Receiver Black 10.5 in RA-RUC-DI-10C-PU. Bringing the highest quality parts to the market while offering the best value as well. This partial upper utilizes a direct impingement operating system on their new... ... more

Rainier Arms Ruc Di 300BLK Partial Upper Receiver Black 10.7 in RA-RUC-DI-300BLK-10-7-PU

Rainier Arms Ruc Di 300BLK Partial Upper Receiver Black 10.7 in RA-RUC-DI-300BLK-10-7-PU. Bringing the highest quality parts to the market while offering the best value as well. This partial upper utilizes a direct impingement operating system on our... ... more

Rock River Arms Completed Upper Receiver National Match A4 .223/5.56mm 20 Inch Barrel 1-8 Twist 1/2-28 Thread Free-Float Handguard A2 Flash Hider

Rock River Arms Completed Upper Receiver National Match A4 .223/5.56mm 20 Inch Barrel 1-8 Twist 1/2-28 Thread Free-Float Handguard A2 Flash Hider. 223 Wylde Completed Upper then you've found yourself in the absolute right spot.. These AR15 Upper... ... more

Rock River Arms Completed Upper Receiver Carbine .350 Legend 16 Inch Barrel 1-16 Twist 1/2-36 Thread Free-Float Handguard Brake Black 350L0328

Rock River Arms Completed Upper Receiver Carbine .350 Legend 16 Inch Barrel 1-16 Twist 1/2-36 Thread Free-Float Handguard Brake Black 350L0328. 350 Legend Completed Upper then you've found yourself in the right place.. Established working with some of... ... more

Rainier Arms Rellim Arms AR-15 5.56 Nato Take Down Upper Receiver Assembly Black 16 in RA-TDURA-556-16

Rainier Arms Rellim Arms AR-15 5.56 Nato Take Down Upper Receiver Assembly Black 16 in RA-TDURA-556-16. Utilizing Rellims patented quick detach upper receiver and barrel nut system and Rainiers quality parts its a match made in heaven. Whether you want... ... more

Aero Precision Complete Upper Receiver M4E1 .300 Blackout Barrel EM-15 HG No BCG/Charging Handle Gen 2 Anodized Black 16in APAR600251M14

Aero Precision Complete Upper Receiver M4E1 .300 Blackout Barrel EM-15 HG No BCG/Charging Handle Gen 2 Anodized Black 16in APAR600251M14. 300 BLK Complete Uppers are equipped with CMV medium profile barrels. Along with excellent fit and finish these... ... more

Aero Precision Complete Upper Receiver M4E1 .300 Blackout Barrel EQ-15 HG No BCG/Charging Handle Gen 2 Anodized Black 16in APAR600251Q14

Aero Precision Complete Upper Receiver M4E1 .300 Blackout Barrel EQ-15 HG No BCG/Charging Handle Gen 2 Anodized Black 16in APAR600251Q14. 300 BLK Complete Uppers are equipped with CMV medium profile barrels. Along with excellent fit and finish these... ... more

Rainier Arms Rellim Arms AR-15 Take Down Upper Receiver Assembly Combo Black RA-TDURA-COMBO

Rainier Arms Rellim Arms AR-15 Take Down Upper Receiver Assembly Combo Black RA-TDURA-COMBO. 5" .223 Wylde configuration into a 8" 300BLK configurations in a matter of seconds. Specifications for Rainier Arms Rellim Arms AR-15 Take Down Upper Receiver... ... more

Rainier Arms Rellim Arms AR-15 .223 Wylde Take Down Upper Receiver Assembly Black 8.5 in RA-TDURA-223-8-5

Rainier Arms Rellim Arms AR-15 .223 Wylde Take Down Upper Receiver Assembly Black 8.5 in RA-TDURA-223-8-5. Utilizing Rellims patented quick detach upper receiver and barrel nut system and Rainiers quality parts its a match made in heaven. Whether you... ... more

Stag Arms AR-15 3-Gun Left Hand Upper Receiver 223 WYLDE 16in Barrel Hanson Profile 1-8 Twist 1/2-28 Thread VG6 Gamma Black STAG15113202

Stag Arms AR-15 3-Gun Left Hand Upper Receiver 223 WYLDE 16in Barrel Hanson Profile 1-8 Twist 1/2-28 Thread VG6 Gamma Black STAG15113202. Specifications for Stag Arms AR-15 3-Gun Left Hand Upper Receiver: Manufacturer: Stag Arms Color: Black Finish:... ... more

Rock River Arms Completed Upper Receiver Left Handed RAGE 2G .223/5.56mm 16 Inch Barrel 1/2-28 Thread A2 Flash Hider Black LH0475

Rock River Arms Completed Upper Receiver Left Handed RAGE 2G .223/5.56mm 16 Inch Barrel 1/2-28 Thread A2 Flash Hider Black LH0475. 223/5.56mm Completed Upper was created to function as the best item for any person trying to find a high quality choice..... ... more

Angstadt Arms Complete Upper Assembly AR-15 5.5 in Handguard 6 in Barrel A2 Flash Hider Picatinny/M-LOK 1/2x28 Black AAUDP0906U

Angstadt Arms Complete Upper Assembly AR-15 5.5 in Handguard 6 in Barrel A2 Flash Hider Picatinny/M-LOK 1/2x28 Black AAUDP0906U. Ready to run with any 9MM AR-15 dedicated lower receiver. Specifications for Angstadt Arms AR-15 Complete 9mm Upper... ... more

Rainier Arms Ruc Pro Mk2 5.56 Nato Partial Upper Receiver Black 10.5 in RA-RUC-PRO-MK2-105-PU

Rainier Arms Ruc Pro Mk2 5.56 Nato Partial Upper Receiver Black 10.5 in RA-RUC-PRO-MK2-105-PU. Bringing the highest quality parts to the market while offering the best value as well. This partial upper utilizes a Rainier Arms Low Pro nonadjustable gas... ... more

Rock River Arms Completed Pistol Upper Receiver A4 .223/5.56mm 16 Inch Barrel Mid-Length Profile 1-9 Twist 1/2-28 Thread A2 Flash Hider w/Gas Block

Rock River Arms Completed Pistol Upper Receiver A4 .223/5.56mm 16 Inch Barrel Mid-Length Profile 1-9 Twist 1/2-28 Thread A2 Flash Hider w/Gas Block. 223/5.56mm Completed Pistol Upper. These AR15 Upper Receivers through the skilled product professionals... ... more

Rock River Arms Completed Pistol Upper Receiver A4 .223/5.56mm 20 Inch Barrel Standart Profile 1-9 Twist 1/2-28 Thread A2 Handguard A2 Flash Hider

Rock River Arms Completed Pistol Upper Receiver A4 .223/5.56mm 20 Inch Barrel Standart Profile 1-9 Twist 1/2-28 Thread A2 Handguard A2 Flash Hider. 223/5.56mm Completed Pistol Upper. These AR15 Upper Receivers through the skilled product professionals... ... more