Shop All - Firearm Accessories & Parts - AR15 Parts & Accessories - Upper Parts - AR Upper Receivers

CMMG Inc.

CMMG Resolute Mk4 .300 Blackout 16.1" Upper Armor Black No BCG/CH - 30BC40AAB

MSRP: $609.00

Was:

Now: $499.95

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WMD Guns

WMD Guns Complete Upper Assembly 300 Blackout 16" Barrel NiB-X Nickel - 1-NIBXUA300BO-16

MSRP: $625.00

Was:

Now: $562.50

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Primary Weapons Systems

PWS MK1 Mod 2-M 11.85" .223 Wylde Piston Upper Receiver Group - MK1-M2U-223-11

MSRP: $1,699.95

Was:

Now: $1,295.95

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TacFire Inc.

TacFire AR-15 Slick Side Stripped Upper Receiver Black Aluminum - UP02

MSRP: $109.99

Was:

Now: $70.95

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Miscellaneous

Gorilla Machining GM-15 Stripped Upper Receiver includes Charging handle Forward Assist and Dust Cover Kit Black Anodized

MSRP: $99.00

Was:

Now: $75.00

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Colt's Manufacturing LLC

Colt Diemaco Stripped Upper Receiver Devtek D Mark Black - COLT-DIEMACO-STRIPPED

MSRP:

Was:

Now: $355.00

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DPMS Panther Arms

DPMS Kitty Kat 7.5" 300 Blackout Complete Upper Quad Rail - DP51655170308

MSRP: $479.99

Was:

Now: $379.99

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Primary Weapons Systems

Primary Weapons Systems MK109 MOD 1-M 300BLK Upper 9.75" - MK1-M1U-300BLK-9

MSRP: $1,209.95

Was:

Now: $1,129.95

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Spikes Tactical

Spike's Tactical SFT52B2 Gen 2 Billet Upper Receiver AR-15 Black

MSRP: $270.00

Was:

Now: $229.95

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Fortis MFG

Fortis Manufacturing Billet M4 Stripped Upper Receiver AR-15 Black

MSRP: $229.99

Was:

Now: $189.95

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Faxon Firearms

Faxon Firearms Enhanced Forged AR-15 Upper Receiver – Stripped – UR-FAX-F-A-S

MSRP: $120.00

Was:

Now: $92.00

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Yankee Hill Machine

YHM A3 Upper Receiver Assembly - Forged 7075-T6 - Forward Assist & Dust Cover Installed

MSRP: $174.95

Was:

Now: $134.95

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One Horse LLC

One Horse OH-UR01 A3 Flat-Top Stripped Upper - Unfinished Raw Aluminum

MSRP: $75.00

Was:

Now: $49.95

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Battle Arms Development

B.A.D. Authority Elite 16-Inch Upper Receiver - Compact Ambi RACK-15 C Handle - BAD-AUTH-UR16B-Y-15C

MSRP: $900.00

Was:

Now: $824.00

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Battle Arms Development

B.A.D. Workhorse 16-Inch Upper Receiver Group - 5.56 NATO - WH-UR16B-Y-15

MSRP: $724.95

Was:

Now: $692.95

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Battle Arms Development

Battle Arms Development WORKHORSE 16" 5.56 Complete Upper - Compact Ambi Handle - WH-UR16B-Y-15C

MSRP: $724.95

Was:

Now: $692.95

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Faxon Firearms

Faxon Duty Series 16" Gunner 7.62x39 Complete Upper - Suppressor Ready - FX-URG-D76216GA15-C-SR

MSRP: $870.00

Was:

Now: $801.00

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Primary Weapons Systems

PWS MK116 MOD 1-M 7.62x39 Upper Receiver - 16.1" Piston Driven - MK1-M1U-762X39-16

MSRP: $1,209.95

Was:

Now: $1,109.95

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Primary Weapons Systems

PWS MK116 MOD 2-M 7.62x39mm Complete Piston Driven Upper - 16.1 Inch Barrel - 811154033253

MSRP: $1,499.95

Was:

Now: $1,379.95

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TacFire Inc.

TacFire BU-45ACP-16 Rifle Upper Assembly 45 ACP Caliber with 16″ Black Nitride Barrel

MSRP: $359.99

Was:

Now: $299.95

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Radian Weapons

Radian Weapons 9" 300 Blackout Model 1 Complete Upper - Cerakote Radian Gray Finish

MSRP: $2,095.95

Was:

Now: $1,829.95

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Heckler and Koch

Heckler & Koch MR762 A4 Upper Receiver Kit 13" - Black

MSRP: $3,049.00

Was:

Now: $2,499.00

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Sig Sauer

Sig Sauer M400 Upper Receiver Assembly - 11.5" / 5.56 NATO

MSRP:

Was:

Now: $1,199.99

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Luth-AR

Luth-AR A1 Assembled Upper Receiver with Carry Handle - 223REM/556NATO, Anodized Black Finish

MSRP: $209.95

Was:

Now: $180.95

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CMMG Inc.

CMMG Resolute Mk4 .300 Blackout 16.1" Upper Armor Black No BCG/CH - 30BC40AAB

CMMG Resolute Mk4 .300 Blackout 16.1" Upper Group - Armor Black - 30BC40AAB Product Description Top off your next custom AR build or expand your caliber rotation with the premium **CMMG® Resolute® Mk4 Upper Group**. This factory-assembled...

MSRP: $609.00

Was:

Now: $499.95

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WMD Guns

WMD Guns Complete Upper Assembly 300 Blackout 16" Barrel NiB-X Nickel - 1-NIBXUA300BO-16

*CONTACT US FOR A SPECIAL COUPON CODE!* WMD Guns NiB-X Matte Nickel 16" .300 Blackout Complete Upper Assembly - 1-NIBXUA300BO-16 Product Description Deploying a modern carbine configuration for heavy intermediate rounds like the .300 AAC Blackout...

MSRP: $625.00

Was:

Now: $562.50

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Primary Weapons Systems

PWS MK1 Mod 2-M 11.85" .223 Wylde Piston Upper Receiver Group - MK1-M2U-223-11

*CONTACT US FOR A SPECIAL COUPON CODE!* Primary Weapons Systems MK111 Mod 2-M .223 Wylde 11.85" Complete Upper Receiver Assembly - MK1-M2U-223-11 Product Description Deploying a short-barreled rifle (SBR) or AR pistol configuration for close-quarters...

MSRP: $1,699.95

Was:

Now: $1,295.95

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TacFire Inc.

TacFire AR-15 Slick Side Stripped Upper Receiver Black Aluminum - UP02

TacFire AR-15 Slick Side Stripped Upper Receiver Matte Black - UP02 Product Description Embarking on a custom AR-15 project requires careful consideration of the core structural interface, particularly when configuring a purpose-built pistol, a...

MSRP: $109.99

Was:

Now: $70.95

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Miscellaneous

Gorilla Machining GM-15 Stripped Upper Receiver includes Charging handle Forward Assist and Dust Cover Kit Black Anodized

Gorilla Machining GM-15 Stripped Upper Receiver Assembly Kit with Charging Handle, Forward Assist, and Dust Cover GM-URDCFA-1-2 Product Description When engineering or assembling custom AR-15 rifle configurations, armorers and tactical builders...

MSRP: $99.00

Was:

Now: $75.00

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Colt's Manufacturing LLC

Colt Diemaco Stripped Upper Receiver Devtek D Mark Black - COLT-DIEMACO-STRIPPED

*RARE* Colt Canada Diemaco Stripped Upper Receiver New old stock in original packaging M4 Feedramps Will show storage wear

MSRP:

Was:

Now: $355.00

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DPMS Panther Arms

DPMS Kitty Kat 7.5" 300 Blackout Complete Upper Quad Rail - DP51655170308

DPMS Panther Arms® "Kitty Kat" Premium Complete Upper Receiver Assembly – .300 AAC Blackout – 7.5" Heavy Nitride Barrel – 6.5" Free-Float Aluminum Quad Rail Handguard – Includes Full-Auto BCG & CH –...

MSRP: $479.99

Was:

Now: $379.99

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Primary Weapons Systems

Primary Weapons Systems MK109 MOD 1-M 300BLK Upper 9.75" - MK1-M1U-300BLK-9

*CONTACT US FOR A SPECIAL COUPON CODE!* Primary Weapons Systems® MK109 MOD 1-M Complete Upper Receiver Assembly – Fits Standard AR-15 Lowers – .300 AAC Blackout – 9.75" Match Grade Barrel – Iconic Long-Stroke Piston System...

MSRP: $1,209.95

Was:

Now: $1,129.95

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Spikes Tactical

Spike's Tactical SFT52B2 Gen 2 Billet Upper Receiver AR-15 Black

*CONTACT US FOR A SPECIAL COUPON CODE!* Spike's Tactical Generation 2 Billet Upper Receiver – .223/5.56 – SFT52B2 The Spike's Tactical Gen II Billet Upper (810083267760) is a 2026-spec premium receiver that moves beyond mere aesthetics to...

MSRP: $270.00

Was:

Now: $229.95

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Fortis MFG

Fortis Manufacturing Billet M4 Stripped Upper Receiver AR-15 Black

*CONTACT US FOR A SPECIAL COUPON CODE!* Fortis Mfg. Billet M4 Upper Receiver – Stripped – Fits AR-15 – U-BILLET-M4 The Fortis Billet M4 Upper Receiver (855476008711) is a 2026-spec masterpiece of aerospace engineering, designed for...

MSRP: $229.99

Was:

Now: $189.95

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Faxon Firearms

Faxon Firearms Enhanced Forged AR-15 Upper Receiver – Stripped – UR-FAX-F-A-S

Faxon Firearms Enhanced Forged AR-15 Upper Receiver – Stripped – UR-FAX-F-A-S The Faxon Firearms Enhanced Forged Upper Receiver (816341022010) is a 2026-spec foundation designed for shooters who want the classic reliability of a forging with...

MSRP: $120.00

Was:

Now: $92.00

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Yankee Hill Machine

YHM A3 Upper Receiver Assembly - Forged 7075-T6 - Forward Assist & Dust Cover Installed

*CONTACT US FOR A SPECIAL COUPON CODE!* Yankee Hill Machine (YHM) A3 Upper Receiver Assembly – AR-15 The YHM A3 Upper Receiver Assembly (YHM-100) is a professional-grade foundation for any AR-15 build, known for its exceptional "made in-house"...

MSRP: $174.95

Was:

Now: $134.95

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One Horse LLC

One Horse OH-UR01 A3 Flat-Top Stripped Upper - Unfinished Raw Aluminum

One Horse LLC OH-UR01 AR15 A3 Stripped Upper – In the White The One Horse LLC OH-UR01 Stripped Upper Receiver (850078799340) is the perfect blank canvas for the custom builder who wants total control over their rifle’s final appearance...

MSRP: $75.00

Was:

Now: $49.95

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Battle Arms Development

B.A.D. Authority Elite 16-Inch Upper Receiver - Compact Ambi RACK-15 C Handle - BAD-AUTH-UR16B-Y-15C

*CONTACT US FOR A SPECIAL COUPON CODE!* Battle Arms Development AUTHORITY ELITE 16" Complete Upper – 5.56 NATO The Battle Arms Development (B.A.D.) AUTHORITY ELITE Complete Upper (BAD-AUTH-UR16B-Y-15C) represents the pinnacle of the B.A.D. lineup,...

MSRP: $900.00

Was:

Now: $824.00

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Battle Arms Development

B.A.D. Workhorse 16-Inch Upper Receiver Group - 5.56 NATO - WH-UR16B-Y-15

*CONTACT US FOR A SPECIAL COUPON CODE!* Battle Arms Development WORKHORSE 16" Complete Upper – 5.56 NATO The Battle Arms Development (B.A.D.) WORKHORSE Complete Upper (WH-UR16B-Y-15C) is a duty-ready assembly built for those who value the perfect...

MSRP: $724.95

Was:

Now: $692.95

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Battle Arms Development

Battle Arms Development WORKHORSE 16" 5.56 Complete Upper - Compact Ambi Handle - WH-UR16B-Y-15C

*CONTACT US FOR A SPECIAL COUPON CODE!* Battle Arms Development WORKHORSE 16" Complete Upper – 5.56 NATO The Battle Arms Development (B.A.D.) WORKHORSE Complete Upper (WH-UR16B-Y-15C) is a duty-ready assembly built for military-grade reliability...

MSRP: $724.95

Was:

Now: $692.95

Add to Cart
Faxon Firearms

Faxon Duty Series 16" Gunner 7.62x39 Complete Upper - Suppressor Ready - FX-URG-D76216GA15-C-SR

*CONTACT US FOR A SPECIAL COUPON CODE!* Faxon Duty Series 16" Gunner 7.62x39 Complete Upper - Suppressor Ready The Faxon Duty Series 16" Gunner 7.62x39 Complete Upper is a purpose-built solution for shooters who want the hard-hitting power of the 7...

MSRP: $870.00

Was:

Now: $801.00

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Primary Weapons Systems

PWS MK116 MOD 1-M 7.62x39 Upper Receiver - 16.1" Piston Driven - MK1-M1U-762X39-16

*CONTACT US FOR A SPECIAL COUPON CODE!* PWS MK116 MOD 1-M 7.62x39 Upper Receiver - 16.1" Piston Driven The Primary Weapons Systems (PWS) MK116 MOD 1-M is a mission-ready upper receiver designed to bring extreme reliability to the 7.62x39mm AR platform...

MSRP: $1,209.95

Was:

Now: $1,109.95

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Primary Weapons Systems

PWS MK116 MOD 2-M 7.62x39mm Complete Piston Driven Upper - 16.1 Inch Barrel - 811154033253

*CONTACT US FOR A SPECIAL COUPON CODE!* PWS MK116 MOD 2-M Upper Receiver 7.62x39 - 16.1" Barrel The Primary Weapons Systems (PWS) MK116 MOD 2-M is a top-tier long-stroke piston upper receiver specifically engineered to handle the 7.62x39mm cartridge with...

MSRP: $1,499.95

Was:

Now: $1,379.95

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TacFire Inc.

TacFire BU-45ACP-16 Rifle Upper Assembly 45 ACP Caliber with 16″ Black Nitride Barrel

The TacFire BU45ACP16 is a complete, ready-to-mount 16-inch .45 ACP AR-platform rifle upper assembly featuring a black nitride barrel, 7075-T6 aluminum receiver, and M-LOK handguard. It includes a Bolt Carrier Group (BCG) and charging handle, designed...

MSRP: $359.99

Was:

Now: $299.95

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Radian Weapons

Radian Weapons 9" 300 Blackout Model 1 Complete Upper - Cerakote Radian Gray Finish

*CONTACT US FOR A SPECIAL COUPON CODE!* The design philosophy behind the Radian Model 1 is simple: use the highest quality raw materials, most precise CNC machining equipment, and best components available to create a weapon that seamlessly blends...

MSRP: $2,095.95

Was:

Now: $1,829.95

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Heckler and Koch

Heckler & Koch MR762 A4 Upper Receiver Kit 13" - Black

This kit includes a complete upper receiver/barrel assembly, allowing Mil-Spec 7.62 mm AR-style rifles to be retrofitted to HK’s piston and pusher rod system. This system utilizes a piston and a pusher rod in place of the gas tube normally found...

MSRP: $3,049.00

Was:

Now: $2,499.00

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Sig Sauer

Sig Sauer M400 Upper Receiver Assembly - 11.5" / 5.56 NATO

*CONTACT US FOR A SPECIAL COUPON CODE!* Upgrade your M4/AR rifle or lower assembly with this complete, drop-in M400 upper assembly. This kit includes all the necessary components for a complete swap, including a ROMEO5 GEN II Red Dot. The...

MSRP:

Was:

Now: $1,199.99

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Luth-AR

Luth-AR A1 Assembled Upper Receiver with Carry Handle - 223REM/556NATO, Anodized Black Finish

*CONTACT US FOR A SPECIAL COUPON CODE!* A1 Upper Receiver (C7) Assembled – Black Looking to build a high-quality retro looking AR? Start your project with our complete A1 upper receiver anodized. Comes with the standard features of a Mil-Spec...

MSRP: $209.95

Was:

Now: $180.95

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