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)
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AT3™
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™
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™RECOMMENDED
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 -
AT3™
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... -
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 Options8 Options8 Options -
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 -
On Sale
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 -
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 Options4 Options4 Options -
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 Options2 Options2 Options -
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 Options4 Options4 Options -
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... -
Strike Industries Collar Adjustable AR-15 Gas Block
Strike Industries Collar Adjustable Gas Block Make gas tuning effortless with the innovative design of Strike Industries' Collar Adjustable Gas Block. This system eliminates the need for tools or guesswork... -
Strike Industries Hex Forward Assist for AR-15
Strike Industries Hex Forward Assist for AR-15: Reliable Mil-Spec Performance Upgrade your AR-15/M16 with the Strike Industries Hex Forward Assist, a mil-spec forward assist assembly engineered for dependable performance. Manufactured...3 Options3 Options3 Options -
Timber Creek Outdoors AR-15 Forward Assist Assembly
Add a Custom Look to Your Upper with the TCO Forward Assist If you're all about the details, you'll appreciate this drop-in replacement for your AR-15 or AR-10 forward assist....8 Options -
AT3™
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... -
SOTA Arms Assembled Mil-Spec AR-15 Upper Receiver
High Value Forged Upper with Forward Assist and Dust Cover Need your build to be on-time, under budget, with an upper you can trust, forward assist and all? This assembled... -
Magpul AR-15 Enhanced Ejection Port Cover
Easy To Install & More Rugged Polymer Ejection Port Cover from Magpul The Enhanced Ejection Port Cover is a more rugged drop-in upgrade that can be installed easily on any...3 Options -
Timber Creek Outdoors Billet Dust Cover – AR BCD
Stylish Billet Replacement for Mil-Spec Dust Covers in Multiple Colors Another great embellishment from Timber Creek Outdoors! This dust cover adds unique character to your AR15 upper without sacrificing function. ...8 Options -
AT3™
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™
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™
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™
AT3™ Slick Side AR-15 Upper with Black Nitride 5.56 Bolt Carrier Group
AT3 Black Nitride Bolt Carrier Group with Slick Side Billet Upper - 8 Colors to Choose From Get a head start on your build with the AT3 Black Nitride Bolt...8 Options -
AT3™
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™
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. ...
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