Battle Arms Development 5.56 Caliber Lightweight Upper Receiver Gen2 Black BAD556-LW-UR

Quarter Circle 10 Side Charging Upper Receiver Pistol Caliber AR-15 Black Anodized QC-PSCU-S

Quarter Circle 10 Side Charging Upper Receiver Pistol Caliber AR-15 Black Anodized QC-PSCU-S. Our upper receiver design is derived from the industry-first Gibbz Arms G9 receiver and with the help of Gibbz engineers and our pistol caliber expertise... ... more

Battle Arms Development Battlearms Workhorse Mlok Handguard Black Anodized 15in BAD-WH-15-MLOK

Battle Arms Development Battlearms Workhorse Mlok Handguard Black Anodized 15in BAD-WH-15-MLOK. This handguard features an aggressive anti-rotation anti-snag design and is completely free floating. The thin lightweight profile not only reduces... ... more

Battle Arms Development Bad-PCC Billet Upper Receiver Black Anodized BAD-PCC-UR

Battle Arms Development Bad-PCC Billet Upper Receiver Black Anodized BAD-PCC-UR. We have made select component changes to accommodate these new dimensions. The majority of these features are the same as our traditional PCC uppers but we have added... ... more

Aero Precision M4E1-E Complete Upper 10.5in 5.56 BRL EM-9 Gen2 HG Anodized W/BCG/CH Black APAR900000

Aero Precision M4E1-E Complete Upper 10.5in 5.56 BRL EM-9 Gen2 HG Anodized W/BCG/CH Black APAR900000. 56 Barrel Complete Upper Receiver. While Aero Precision built these AR15 Upper Receivers these specific ones are only available right here at... ... more

Aagil Arms Ted Nugent's Signature Series 5.56 NATO AR-15 Upper Receiver Assembly w/ 15in Cobra Style Handguard Gun Black Cerakoted AA-CURK16556C15TNGB

Aagil Arms Ted Nugent's Signature Series 5.56 NATO AR-15 Upper Receiver Assembly w/ 15in Cobra Style Handguard Gun Black Cerakoted AA-CURK16556C15TNGB. Ted Nugent. This is only one model out of 3 in Ted Nugent's Signature Series. This upper assembly... ... more

Battle Arms Development Pistol Length Lightweight Stock Combo / Qd End Plate Black SABERTUBE-QD-P-B-COMBO

Battle Arms Development Pistol Length Lightweight Stock Combo / Qd End Plate Black SABERTUBE-QD-P-B-COMBO. Precision CNC from billet 6061 Aircraft Grade Aluminum MilSpec Type III Class 2 Hard Anodized Black Unique Lightweight and Functional Dimpled... ... more

Aero Precision M4E1 Threaded Stripped Upper Receiver 223 Remington/5.56 NATO 7075-T6 Aluminum Black Anodized APAR700201C

Aero Precision M4E1 Threaded Stripped Upper Receiver 223 Remington/5.56 NATO 7075-T6 Aluminum Black Anodized APAR700201C. 56 NATO. These AR15 Upper Receivers made by Aero Precision are machined from rugged lightweight 7075-T6 aluminum with your... ... more

Battle Arms Development BAD-WH6.7-MLOK Workhorse 6.70 M-LOK Rail Black Hardcoa

Battle Arms Development BAD-WH6.7-MLOK Workhorse 6.70 M-LOK Rail Black Hardcoa. 7-MLOK Workhorse 6.70" M-LOK Rail Black Hardcoa - The WORKHORSE MLOK compatible rail system was designed to be a lightweight and slimline option to be used on MIL-SPEC... ... 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... ... more

Stag Arms AR-15 Retro Right Hand Upper Receiver 5.56 NATO 20in Barrel 1-7 Twist 1/2 x 28 Thread A2 Birdcage Flash Hider Black STAG15101011

Stag Arms AR-15 Retro Right Hand Upper Receiver 5.56 NATO 20in Barrel 1-7 Twist 1/2 x 28 Thread A2 Birdcage Flash Hider Black STAG15101011. Made to mil-spec standards with a removable A3 carry handle and a rifle length thermoplastic handguard with... ... more

Angstadt Arms Angstadt Upper Receiver Pistol Calibers 9mm/40sw/10mm/.45acp

Angstadt Arms Angstadt Upper Receiver Pistol Calibers 9mm/40sw/10mm/.45acp. 40 S&W .357 SIG 45acp and 10mm. Specifications for Angstadt Arms Angstadt Upper Receiver Pistol Calibers 9mm/40sw/10mm/.45acp: Manufacturer: Angstadt Arms Color: Black... ... more

Stag Arms AR-10 Tactical Left Hand Upper Receiver 308 Win 16in Barrel TAC-GOV-CMV Profile 1-10 Twist 5/8X24 Thread VG6 Gamma Black STAG10110342

Stag Arms AR-10 Tactical Left Hand Upper Receiver 308 Win 16in Barrel TAC-GOV-CMV Profile 1-10 Twist 5/8X24 Thread VG6 Gamma Black STAG10110342. Specifications for Stag Arms 10 Tactical Left Hand 16in .308 Caliber Upper Receiver: Manufacturer: Stag... ... more

Stag Arms AR-10 Marksman Right Hand Upper Receiver 308 Win 18in Barrel HBAR-CMV Profile 1-10 Twist 5/8X24 Thread VG6 Gamma Black STAG10100142

Stag Arms AR-10 Marksman Right Hand Upper Receiver 308 Win 18in Barrel HBAR-CMV Profile 1-10 Twist 5/8X24 Thread VG6 Gamma Black STAG10100142. Specifications for Stag Arms 10 Marksman Right Hand 18in .308 Caliber Upper Receiver: Manufacturer: Stag... ... 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

Rainier Arms RUC DI 5.56 NATO Partial Upper Receiver 16in Black Medium RA-RUC-DI-16M-PU

Rainier Arms RUC DI 5.56 NATO Partial Upper Receiver 16in Black Medium RA-RUC-DI-16M-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... ... more

Stag Arms AR-15 Retro Right Hand Upper Receiver 5.56 NATO 20in Barrel NJ Compliant 1-7 Twist 1/2 x 28 Thread Compensator Black STAG15101013

Stag Arms AR-15 Retro Right Hand Upper Receiver 5.56 NATO 20in Barrel NJ Compliant 1-7 Twist 1/2 x 28 Thread Compensator Black STAG15101013. Made to mil-spec standards with a removable A3 carry handle and a rifle length thermoplastic handguard with... ... more

Stag Arms AR-15 Upper Right Hand Receiver 5.56 NATO 16in Barrel NJ Compliant M4 Profile 1-7 Twist 1/2 x 28 Thread Compensator Black STAG15101113

Stag Arms AR-15 Upper Right Hand Receiver 5.56 NATO 16in Barrel NJ Compliant M4 Profile 1-7 Twist 1/2 x 28 Thread Compensator Black STAG15101113. Made to mil-spec standards this upper satisfies the need for a standard GI carbine. Featuring a... ... 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... ... more

Stag Arms AR-15 Upper Left Hand Receiver 5.56 NATO 16in Barrel NJ Compliant M4 Profile1-7 Twist 1/2 x 28 Thread Compensator Black STAG15111113

Stag Arms AR-15 Upper Left Hand Receiver 5.56 NATO 16in Barrel NJ Compliant M4 Profile1-7 Twist 1/2 x 28 Thread Compensator Black STAG15111113. 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

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... ... more

Rainier Arms RUC DI 5.56 Nato Partial Upper Receiver Black 14.5 in RA-RUC-DI-14M-PU

Rainier Arms RUC DI 5.56 Nato Partial Upper Receiver Black 14.5 in RA-RUC-DI-14M-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... ... more

Rainier Arms Ruc Pro Mk1 5.56 Nato Partial Upper Receiver Black 10.5 in RA-MK1-10.5-PU-BLK

Rainier Arms Ruc Pro Mk1 5.56 Nato Partial Upper Receiver Black 10.5 in RA-MK1-10.5-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

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... ... 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

Rainier Arms Ruc Pro Mk1 5.56 Nato Partial Upper Receiver Black 11.5 in RA-MK1-11.5-PU-BLK

Rainier Arms Ruc Pro Mk1 5.56 Nato Partial Upper Receiver Black 11.5 in RA-MK1-11.5-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

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... ... more

Rainier Arms Ruc Pro Mk2 5.56 Nato Partial Upper Receiver Black 12 in RA-RUC-PRO-MK1-RS-12-PU

Rainier Arms Ruc Pro Mk2 5.56 Nato Partial Upper Receiver Black 12 in RA-RUC-PRO-MK1-RS-12-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... ... more

Rainier Arms Ruc Pro Mk2 5.56 Nato Partial Upper Receiver Black 12.5 in RA-RUC-PRO-MK2-125-PU

Rainier Arms Ruc Pro Mk2 5.56 Nato Partial Upper Receiver Black 12.5 in RA-RUC-PRO-MK2-125-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... ... more

Rainier Arms Ruc Pro Mk2 5.56 Nato Partial Upper Receiver Black 11.5 in RA-RUC-PRO-MK1-RS-115-PU

Rainier Arms Ruc Pro Mk2 5.56 Nato Partial Upper Receiver Black 11.5 in RA-RUC-PRO-MK1-RS-115-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... ... 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... ... more

Matador Arms Mat9 Upper Receiver 9mm 7.825 in 1-10 Twist 1/2x28 Threads 4150 Lightweight Nitrided Black MAT9-U-BLK

Matador Arms Mat9 Upper Receiver 9mm 7.825 in 1-10 Twist 1/2x28 Threads 4150 Lightweight Nitrided Black MAT9-U-BLK. Bufferless compact and reliable. The blowback system runs suppressed or unsuppressed without spring changes. The charging handle is... ... more

Battle Arms Development AR-15 Lightweight Ambi Safety Selector Reversible 90/60 Black BADASSLITE

Battle Arms Development AR-15 Lightweight Ambi Safety Selector Reversible 90/60 Black BADASSLITE. From the inventors of the very first fully modular patented ambidextrous safety selector for the AR-15 platform Battle Arms Development is raising the... ... more

Battle Arms Development Workhorse 10.5in 5.56 Nato Upper Receiver Assembly No Bcg No Ch WH-UR-10.5-556

Battle Arms Development Workhorse 10.5in 5.56 Nato Upper Receiver Assembly No Bcg No Ch WH-UR-10.5-556. 5-556 Barcode: 810033783784 Barrel Length: 10.5in Gas System: Carbine Barrel Profile: A2 Barrel Steel: 4150 Chrome-Moly Vanadium Barrel Finish:... ... more

Battle Arms Development Workhorse 16in 5.56 Nato Upper Receiver Assembly No Bcg No Ch WH-UR-16-556

Battle Arms Development Workhorse 16in 5.56 Nato Upper Receiver Assembly No Bcg No Ch WH-UR-16-556. 56 NATO Twist Rate: 1:7 Barrel Extension: M4 Diameter at Gas Block: .750 Gas Block Type: Low-profile Muzzle Device: A2 Flash Hider Receiver Material:... ... more

Luth-AR 11.5 in Light Weight Complete Upper Barrel Receiver Assembly - 5.56 1x7 twist K-Mod Free Float Handguard Black 11.5 BA-11-7K

Luth-AR 11.5 in Light Weight Complete Upper Barrel Receiver Assembly - 5.56 1x7 twist K-Mod Free Float Handguard Black 11.5 BA-11-7K. 5 in complete upper barrel assembly is a lightweight and durable option for your next build. With a 1-7 twist rate... ... more

Luth-AR 16 in Light Weight Complete Upper Barrel Receiver Assembly - 5.56 1x9 twist MLOK Free Float Handguard Black 16 BAA3-L16M

Luth-AR 16 in Light Weight Complete Upper Barrel Receiver Assembly - 5.56 1x9 twist MLOK Free Float Handguard Black 16 BAA3-L16M. 56mm Lightweight barrel made from 4140 Chrome Molly with a 1-9 in twist mated to our A3 Flattop receiver which includes... ... more