AR-15 Upper Receivers and Parts
Quality AR-15 Upper Receivers and Parts
When it comes to AR15 Upper Receivers, we have what you need for your next build.
Looking for complete upper receiver assemblies with barrel and handguard? Check out our complete upper assemblies category.
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- Uppers & Parts - AT3 Tactical (23)
- Uppers & Parts - Aero Precision (16)
- Uppers & Parts - Luth-AR (15)
- Uppers & Parts - Strike Industries (10)
- Uppers & Parts - LBE Unlimited (6)
- Uppers & Parts - CMMG (5)
- Uppers & Parts - Timber Creek Outdoors (3)
- Uppers & Parts - KE Arms (3)
- Upper Receiver Parts - Ballistic Advantage (3)
- Uppers & Parts - UTG (2)
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- Uppers & Parts - JP Enterprises (2)
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- Upper Receivers Parts - Yankee Hill Machine (1)
- Uppers & Parts - Wilson Combat (1)
- Uppers & Parts - VLTOR Weapon Systems (1)
- Uppers & Parts - SOTA Arms (1)
- Uppers & Parts - Odin Works (1)
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- Upper Receivers - Bravo Company (1)
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- Uppers & Parts - Black (57)
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- Upper Receivers Parts - Stainless (4)
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AT3™Sale!
AT3™ AR 15 Ejection Port Cover C-Clip – Pack of 2
AT3™ AR-15 Ejection Port Cover C-Clips - Pack of 2 All AT3 Tactical lower receiver parts meet or exceed Mil Spec. These parts are guaranteed to fit and function in... -
AT3™Sale!
AT3™ 1/2 Inch Crush Washer for .223/5.56 Muzzle Devices Compatible with AR 15
Time Your Muzzle Device with a Black Nitride Crush Washer from AT3 Crush washers are essential to replace after removing for replacing a muzzle device. Re-using crush washers can lead... -
AT3™Sale!
AT3 Tactical Firing Pin Retainer for AR15 BCG
Replacement Cotter Pin for AR-15 Firing Pin From the first time you've stripped down your AR15, you've probably learned to hate the firing pin retainer. It can be hard to... -
10% Off!
Strike Industries PolyFlex AR-15 Dust Cover
Introducing the Strike Industries PolyFlex Dust Cover Upgrade your AR-15 with the Strike Industries PolyFlex Dust Cover, hosting a hassle-free, tool-less installation in seconds. With its innovative one-piece construction and... -
AT3™Sale!
AT3™ AR-15 Barrel Nut & Delta Ring Assembly
Mil-Spec Delta Ring Assembly for AR15/M4/M16 Fully assembled, and consists of 4 parts: Mil-Spec Barrel Nut Delta Ring, Snap Ring, and Weld Spring. If you have damaged your delta ring... -
AT3™Sale!
AT3™ AR15 Forward Assist
AT3 AR-15 Forward Assist Assembly Mil-Spec forward assist assembly. Made for AR-15/M16 and in the USA. ?Backed by the AT3 Lifetime Warranty Includes: Forward Assist Assembly Forward Assist Spring Forward... -
AT3™Sale!
AT3 Tactical Gas Rings for AR15 Bolts – Set of 3
Set of 3 Gas Rings for Repairing an AR15 Bolt If your AR15 isn't cycling reliably, it may be due to the gas rings on your bolt wearing out. The... -
AT3™Sale!
AT3™ Handguard End Cap – Round
AT3™ Handguard End Cap - Round The Mil-Spec AR-15 Handguard End Cap is a high-quality part for your AR-15. The end cap features a .750" diameter barrel opening, making it... -
AT3™Sale!
AT3 Tactical Extractor Retainer Pin for AR 15
Replacement Extractor Retainer Pin for AR-15 The extractor pin is a simple part that your AR-15 needs for reliable function. Or rather, basic function. Without this pin to hold the... -
AT3™Sale!
AT3™ AR15 Ejection Port / Dust Cover Assembly
AT3 AR-15 Ejection Port Assembly Often called the "dust cover" on an AR-15, the ejection port cover helps seal your AR-15's bolt carrier against the elements while not in use. ... -
AT3™Sale!
AT3 Tactical Extractor O-Ring
Replacement or Upgrade O-Ring for AR-15 Extractor One of the smaller changes to most AR-15 bolts is the addition of a rubber o-ring over the extractor spring. This little piece...$0.99Only$0.84 -
AT3™Sale!
AT3 Tactical Extractor Spring for AR 15 Bolts
Replacement Extractor Spring for AR-15 Bolts All springs have a limited life. With enough cycles, the spring will wear out - and in the case of the extractor spring, having...$0.99Only$0.84 -
AT3™Sale!
AT3 Tactical AR 15 Ejector Roll Pin
Replacement Ejector Roll Pin for AR-15 You ever strip down your AR-15 bolt to its base components, try to reassemble, only to find there's something missing? The roll pin for...$0.99Only$0.84 -
AT3™Sale!
AT3 Tactical™ Complete AR-15 Upper Parts Kit – Forward Assist & Dust Cover
Complete Upper Parts Kit For Your Stripped Upper Receiver The AT3 Tactical™ AR-15 Upper Parts Kit is an ideal replacement for your standard forward assist and ejection port cover. It... -
AT3™Sale!
AT3 Tactical Cam Pin for AR15 BCG
Replacement Cam Pin for AR-15 The cam pin is a crucial component in your AR-15's bolt carrier group. It rotates inside the bolt carrier as the bolt locks and unlocks...$4.99Only$4.24 -
AT3™Sale!
AT3 Tactical Ejector for AR-15 Bolts
Hardened Replacement Ejector for AR-15 Bolts The ejector in an AR-15 bolt is one of the most vital components for consistent reliability. Pushing your spent brass out of the action,... -
AT3™Sale!
AT3 Upper Receiver Black + AT3 Bolt Carrier Group + Breek Arms Warhammer Charging...
Complete your Next Build with AT3's Top-Selling Billet Upper Receiver and BCG plus the Trusted Breek Arms Warhammer Charging Handle Save by bundling vs purchasing the parts individually, plus free...$249.99Only$212.49 -
AT3™RECOMMENDEDSale!
AT3™ Slick Side Upper | Billet Upper Receiver for AR-15
Tough, Sleek, and ready for the AT3 SPEAR M-LOK Handguard Machined from billet aluminum, this unique slick-side upper receiver has no forward assist, includes a dust cover, and matches perfectly...8 Options -
10% Off!
Strike Industries Ultimate AR-15 Dust Cover
Strike Industries Ultimate AR-15 Dust Cover: Next-Gen Protection Elevate your AR-15 with the Strike Industries Ultimate Dust Cover (UDC), a game-changing upgrade that redefines convenience and functionality. Designed for effortless...8 Options -
10% Off!
Strike Industries Ultimate AR-15 Billet Dust Cover
Billet UDC: The Ultimate Dust Cover Redefined Elevate your AR setup with the Strike Industries Billet Ultimate Dust Cover – a showcase of engineering and design. Featuring our quick detach...4 Options -
10% Off!
Strike Industries Extended Forward Assist for AR -15
Accelerate Your AR: Strike Industries Extended Forward Assist Enhance your AR's functionality and aesthetic with the Strike Industries Extended Forward Assist. This innovative upgrade offers a larger, textured surface for...4 Options -
10% Off!
Strike Industries Latchless AR-15 Charging Handle
Strike Industries Latchless AR-15 Charging Handle: Simplicity Redefined Experience the next evolution in AR-15 performance with the Strike Industries Latchless Charging Handle. This revolutionary design represents a quantum leap in...4 Options -
10% Off!
Strike Industries Ultimate AR-10 Dust Cover
Strike Industries Ultimate AR-10 Dust Cover: Uncompromising Protection Elevate your AR-10 with the Strike Industries Ultimate Dust Cover. Engineered for effortless installation and removal in just 5-10 seconds, this innovative...4 Options -
10% Off!
Strike Industries Overmolded AR-15 Dust Cover
Strike Industries Overmolded AR-15 Dust Cover: Next-Level Protection Upgrade your AR-15 with the Strike Industries Overmolded Dust Cover, the next evolution in debris protection. This cutting-edge design features a double...2 Options
Other AR-15 Upper Receiver Components:
AR 15 Charging Handles
AR 15 Gas Blocks & Tubes
AR 15 Handguards & Quad Rails
AR-15 Barrels
AR-15 Bolt Carrier Groups
AR-15 Front Grips
AR-15 Upper Receivers and Parts
Muzzle Devices
AR-15 Handguard Accessories