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

American Defense Mfg

American Defense UIC Billet Upper Receiver - Black

MSRP:

Was:

Now: $358.00

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Patriot Ordnance Factory

POF Revolution PD Upper Receiver - Black

MSRP: $420.00

Was:

Now: $375.00

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WMD Guns

WMD Guns Stripped Upper Receiver 556NATO A3/A4 with M4 Feed Ramps - NiB-X Nickel Coating

MSRP: $129.99

Was:

Now: $107.10

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Heckler and Koch

Heckler & Koch MR556 A4 16.5" Upper Receiver - Black

MSRP: $2,695.95

Was:

Now: $2,159.00

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Colt's Manufacturing LLC

Colt 223 Rem/ 556 NATO M4 Feed Ramps Upper - Black

MSRP: $189.99

Was:

Now: $164.95

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Daniel Defense

Daniel Defense DDM4V7 Complete Upper Receiver Group - Black

MSRP: $1,350.00

Was:

Now: $1,208.00

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LanTac USA

LanTac USA PDP 7.5" 300 Blackout Complete Upper Receiver - Black

MSRP: $1,339.99

Was:

Now: $1,119.99

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TacFire Inc.

TacFire BU30010 300 Blackout 10" Upper Assembly

MSRP: $499.99

Was:

Now: $309.99

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Daniel Defense

Daniel Defense 23-004-81721-011 MK18 RIII Upper Receiver Group 5.56x45mm NATO 10.30" - FDE

MSRP: $1,517.00

Was:

Now: $1,412.00

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Stern Defense

Stern Defense MOD5 45 ACP Complete Upper - 8" MLOK Handguard, 6" Barrel, Black Finish

MSRP: $599.99

Was:

Now: $555.12

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Daniel Defense

Daniel Defense 23-191-02397-011 DD4 RIII S 11.5" AR15 Upper Receiver Group - FDE

MSRP: $1,517.00

Was:

Now: $1,412.00

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Aero Precision

Aero Precision M4E1 Enhanced 8" .300 Blackout Complete Upper Receiver with R-ONE Handguard - Black

MSRP: $650.00

Was:

Now: $534.99

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Battle Arms Development

Battle Arms Development Workhorse AR15/M4 Forged Upper Receiver Anodized OD Green

MSRP: $145.00

Was:

Now: $110.00

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Primary Weapons Systems

Primary Weapons Systems MK111 MOD 1-M Upper .223 Wylde

MSRP: $1,129.95

Was:

Now: $1,049.95

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Geissele Automatics

Geissele Automatics Super Duty MOD1 10.3" 556NATO Complete Upper Receiver - DDC

MSRP: $1,650.00

Was:

Now: $1,438.20

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Geissele Automatics

Geissele Automatics Super Duty MOD1 10.3" 556NATO Complete Upper Receiver - Black

MSRP: $1,550.00

Was:

Now: $1,285.00

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Patriot Ordnance Factory

Patriot Ordnance Factory Minuteman AR15/M4 10.5" 556NATO Complete Upper with Ambi Charging Handle

MSRP: $1,195.00

Was:

Now: $1,040.00

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Radian Weapons

Radian Weapons 10.5" 223 Wylde MODEL 1 Complete Upper - Cerakote Black Finish

MSRP: $2,095.95

Was:

Now: $1,904.95

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Battle Arms Development

Battle Arms Development Authority Elite AR15/M4 10.5" 556NATO Complete Upper with Ambi Charging Handle

MSRP: $895.00

Was:

Now: $819.00

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Faxon Firearms

Faxon Ascent 10.5" 5.56 Complete Upper Receiver Group - MLOK Handguard, Black

MSRP: $575.00

Was:

Now: $529.00

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Daniel Defense

Daniel Defense MK18 URG Complete Upper Receiver - 556NATO, 10.3" Hammer Forged Barrel, 1:7 Twist, Flat Top Receiver, Black Finish

MSRP: $1,468.00

Was:

Now: $1,366.00

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Battle Arms Development

Battle Arms Development WORKHORSE Complete Upper - 556NATO, 10.5" Barrel, Includes Bad Rack-15 C Ambidextrous Charging Handle and AR15/M16 BCG

MSRP: $692.98

Was:

Now: $659.98

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Battle Arms Development

Battle Arms Development WORKHORSE Complete Upper - 556NATO, 10.5" Barrel, Includes Bad Rack-15 Ambidextrous Charging Handle and AR15/M16 BCG

MSRP: $692.98

Was:

Now: $659.98

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CMMG Inc.

CMMG 30B0E67AB Dissent MK4 300 Blackout 6.50" Upper Assembly - Black

MSRP: $1,399.95

Was:

Now: $1,174.95

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American Defense Mfg

American Defense UIC Billet Upper Receiver - Black

The ADM UIC Billet Upper Receiver comes with the Forward Assist and Ejection Port Cover installed. Precision machined from 7075-T6 M4 Feedramps Hard Coat Anodized per Mil-A-8625F, Type III, Class2 Made with pride in the U.S.A. Weight- 9 oz

MSRP:

Was:

Now: $358.00

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Patriot Ordnance Factory

POF Revolution PD Upper Receiver - Black

Revolution PD Upper Receiver The assembled Revolution PD Upper Receiver features POF-USA's patented MRR backbone system and is compatible only with P-415 EDGE rails. These uppers come with a U.S. Flag laser engraved ejection...

MSRP: $420.00

Was:

Now: $375.00

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WMD Guns

WMD Guns Stripped Upper Receiver 556NATO A3/A4 with M4 Feed Ramps - NiB-X Nickel Coating

NiB-X A3/A4 Upper Receiver w/M4 Feed Ramps, Forged, 7075 T6 Mil Spec forging with M4 feed ramps. Ideal building block for a long lasting AR15. This 7075 T6 Aluminum forged Mil Spec receiver with M4 feed ramps has NiB-X coating inside and out...

MSRP: $129.99

Was:

Now: $107.10

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Heckler and Koch

Heckler & Koch MR556 A4 16.5" Upper Receiver - Black

*CONTACT US FOR A SPECIAL COUPON CODE!* This kit includes a complete upper receiver/barrel assembly, allowing Mil-Spec 5.56mm AR-style rifles to be retrofitted to HK’s piston and pusher rod system. This system utilizes a piston and a...

MSRP: $2,695.95

Was:

Now: $2,159.00

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Colt's Manufacturing LLC

Colt 223 Rem/ 556 NATO M4 Feed Ramps Upper - Black

The durability, reliability and excellent build quality of Colt uppers will provide years of service you can count on. Colt’s Manufacturing Upper 223REM/556NATO Black Finish Dust Cover Forward Assist M4 Feed Ramps Features: M4 Feed Ramps Forward...

MSRP: $189.99

Was:

Now: $164.95

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Daniel Defense

Daniel Defense DDM4V7 Complete Upper Receiver Group - Black

The DDM4 V7 AR15 style Upper Receiver Group is built around a Cold Hammer Forged 16 inch barrel and equipped with a DD improved Flash Suppressor to reduce flash signature. It features a mid-length gas system for smooth, reliable cycling and reduced wear...

MSRP: $1,350.00

Was:

Now: $1,208.00

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LanTac USA

LanTac USA PDP 7.5" 300 Blackout Complete Upper Receiver - Black

The Lantac .300 Blackout 7.5" Personal Defense Pistol (PDP) Complete Upper Receiver is highly reliable and allows for an ultra-compact AR pistol or SBR. Using the same components found on Lantac’s LA-SF15, this upper is designed to...

MSRP: $1,339.99

Was:

Now: $1,119.99

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TacFire Inc.

TacFire BU30010 300 Blackout 10" Upper Assembly

Chambered in 300 Blackout, this rifle upper is completely built and ready to be put on a lower. Includes Bolt Carrier Group. Caliber 300 Blackout Barrel Length Range 10" to 10.99" Firearm Fit AR-Platform Sights None Barrel Finish Black...

MSRP: $499.99

Was:

Now: $309.99

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Daniel Defense

Daniel Defense 23-004-81721-011 MK18 RIII Upper Receiver Group 5.56x45mm NATO 10.30" - FDE

*CONTACT US FOR A SPECIAL COUPON CODE!* The MK18 RIII™ AR15 style Upper Receiver Group is unmatched in size, weight, and performance, and is built around a 10.3 inch Cold Hammer Forged M4 Profile barrel with a Daniel Defense Flash...

MSRP: $1,517.00

Was:

Now: $1,412.00

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Stern Defense

Stern Defense MOD5 45 ACP Complete Upper - 8" MLOK Handguard, 6" Barrel, Black Finish

WHATS INCLUDED! Stern Defense 8 inch M-LOK rail(Barrel nut, bolts etc.) Stern Defense 6 inch 45acp barrel.SD HBC 45 BLAST CAN.Stern Defense assembled upper receiver 45 with dust cover and forward assist. Stern Defense SD BU45 Glock cut...

MSRP: $599.99

Was:

Now: $555.12

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Daniel Defense

Daniel Defense 23-191-02397-011 DD4 RIII S 11.5" AR15 Upper Receiver Group - FDE

*CONTACT US FOR A SPECIAL COUPON CODE!* The DD4™ RIII™S AR15 style Upper Receiver Group is built around a 11.5 inch Cold Hammer Forged Government Profile barrel with a Daniel Defense Flash Suppressor, a GRIP-N-RIP Charging...

MSRP: $1,517.00

Was:

Now: $1,412.00

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Aero Precision

Aero Precision M4E1 Enhanced 8" .300 Blackout Complete Upper Receiver with R-ONE Handguard - Black

This complete upper includes our new ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight in mind, while still providing plenty of real-estate to accommodate any attachment needs the end user may have. Our proprietary ATLAS...

MSRP: $650.00

Was:

Now: $534.99

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Battle Arms Development

Battle Arms Development Workhorse AR15/M4 Forged Upper Receiver Anodized OD Green

WORKHORSE® AR15/M4 FORGED UPPER RECEIVER - ODG Made from 7075 - T6 aluminum Type III hard coat anodized OD Green finish Top notch cut to match WORKHORSE® and RIGIDRAIL aesthetic M4 Feed Ramp Does not include ejection port or...

MSRP: $145.00

Was:

Now: $110.00

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Primary Weapons Systems

Primary Weapons Systems MK111 MOD 1-M Upper .223 Wylde

*CONTACT US FOR A SPECIAL COUPON CODE!* The MK111 MOD 1-M Upper is equipped with the renowned PWS PWS long-stroke piston system, maintaining the reliability that PWS owners have come to trust. This line features a free-float MLOK handguard, forward...

MSRP: $1,129.95

Was:

Now: $1,049.95

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Geissele Automatics

Geissele Automatics Super Duty MOD1 10.3" 556NATO Complete Upper Receiver - DDC

*CONTACT US FOR A SPECIAL COUPON CODE!* Super Duty® MOD1 Complete Upper, 10.3", 5.56mm - DDC The Super Duty® MOD1 is the current evolution of the Super Duty® platform, incorporating continuous design development to provide superior...

MSRP: $1,650.00

Was:

Now: $1,438.20

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Geissele Automatics

Geissele Automatics Super Duty MOD1 10.3" 556NATO Complete Upper Receiver - Black

*CONTACT US FOR A SPECIAL COUPON CODE!* Super Duty® MOD1 Complete Upper, 10.3", 5.56mm - Black The Super Duty® MOD1 is the current evolution of the Super Duty® platform, incorporating continuous design development to provide superior...

MSRP: $1,550.00

Was:

Now: $1,285.00

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Patriot Ordnance Factory

Patriot Ordnance Factory Minuteman AR15/M4 10.5" 556NATO Complete Upper with Ambi Charging Handle

*CONTACT US FOR A SPECIAL COUPON CODE!* 10.5 Minuteman Upper - 5.56 NATO The 10.5 Minuteman Upper is our twist on what a direct impingement barreled upper should be. Mount your favorite optic and the Minuteman Upper is ready for the range or the field...

MSRP: $1,195.00

Was:

Now: $1,040.00

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Radian Weapons

Radian Weapons 10.5" 223 Wylde MODEL 1 Complete Upper - Cerakote Black 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: $1,904.95

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Battle Arms Development

Battle Arms Development Authority Elite AR15/M4 10.5" 556NATO Complete Upper with Ambi Charging Handle

*CONTACT US FOR A SPECIAL COUPON CODE!* The heart of the BAD Authority Elite upper receiver is the billet BAD556 7075-T6 aircraft grade aluminum receiver with integral ambidextrous controls and free-float rail handguard with M-LOK attachment points at...

MSRP: $895.00

Was:

Now: $819.00

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Faxon Firearms

Faxon Ascent 10.5" 5.56 Complete Upper Receiver Group - MLOK Handguard, Black

Faxon Firearms set out to create a dependable and affordable 5.56 upper receiver group that will be a drop-in fit to complete your newest AR-15 build, or as a replacement or spare upper for the firearm you already own. The Faxon Ascent 10.5"...

MSRP: $575.00

Was:

Now: $529.00

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Daniel Defense

Daniel Defense MK18 URG Complete Upper Receiver - 556NATO, 10.3" Hammer Forged Barrel, 1:7 Twist, Flat Top Receiver, Black Finish

The MK18 AR15 style Upper Receiver Group is unmatched in size, weight, and performance, and features the picatinny quad rail Daniel Defense provides to USSOCOM. The RIS II rail features a Bolt-Up System that has been rigorously tested prior to...

MSRP: $1,468.00

Was:

Now: $1,366.00

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Battle Arms Development

Battle Arms Development WORKHORSE Complete Upper - 556NATO, 10.5" Barrel, Includes Bad Rack-15 C Ambidextrous Charging Handle and AR15/M16 BCG

The WORKHORSE complete upper receiver is purpose-built around the forged WORKHORSE 7075-T6 aircraft-grade aluminum receiver and free-float rail handguard with M-LOK attachment point at 3, 6, and 9 o'clock positions. At 12 o'clock is a full-length...

MSRP: $692.98

Was:

Now: $659.98

Add to Cart
Battle Arms Development

Battle Arms Development WORKHORSE Complete Upper - 556NATO, 10.5" Barrel, Includes Bad Rack-15 Ambidextrous Charging Handle and AR15/M16 BCG

The WORKHORSE complete upper receiver is purpose-built around the forged WORKHORSE 7075-T6 aircraft-grade aluminum receiver and free-float rail handguard with M-LOK attachment point at 3, 6, and 9 o'clock positions. At 12 o'clock is a full-length...

MSRP: $692.98

Was:

Now: $659.98

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CMMG Inc.

CMMG 30B0E67AB Dissent MK4 300 Blackout 6.50" Upper Assembly - Black

Pack some 30 Cal power into a pint size PDW. Perfect for your existing Mk4 DISSENT® lower or standard AR15 lower group, this upper group combines utility, innovation, and unmatched style that lets you build or swap your DISSENT to 300BLK. Take your...

MSRP: $1,399.95

Was:

Now: $1,174.95

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