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. READ MORE
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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™ 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™ 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™
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... -
AT3™NEW
AT3™ Forged AR-15 Stripped Upper Receiver
AT3 Forged AR Upper - Just Add Forward Assist and Dust Cover The Forged AT3 Upper is here, in a full array of Cerakote shades for your next custom build!...7 Options -
NEW
Bravo Company Mil-Spec AR-15 Upper Receiver
Bravo Company Mil-Spec AR-15 Upper Receiver Bravo Company's Upper is an exceptional addition to any firearm enthusiast's collection. This upper is specifically designed with precision in mind, and it shows... -
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... -
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... -
AT3™NEW
AT3™ Forged Upper Receiver and SPEAR Handguard Combo
AT3 M-LOK Handguard with Forged AR Upper Combo Build your rifle the way you want, and save some money by bundling a forged upper with a lightweight M-LOK handguard! This...21 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™NEW
AT3™ Forged AR-15 Upper Receiver and Pro Quad Rail Combo
AT3 Forged Upper with Lightweight Quad Rail Combo If you're looking to update your rifle with a custom look and a rock solid quad rail, save big by bundling AT3's...28 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 -
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 -
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™ 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 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™ AR15 Ejection Port Cover Dust 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™
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™ 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 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... -
AT3™
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... -
Aero Precision Upper Receiver Assembled for AR-15 w/ Forward Assist & Dust Cover
High-Quality AR-15 Assembled Upper Receiver With Port Door & Forward Assist The Aero Precision AR15 Assembled Upper Receiver is an excellent upgrade for your AR build that comes with the...5 Options -
Aero Precision AR-15 Upper Parts Kit – Forward Assist & Dust Cover
Complete Upper Parts Kit - All Necessary Parts Included This upper parts kit includes the parts you need to assemble a stripped AR15 Upper Receiver. Includes: Forward Assist Assembly Forward... -
Strike Industries Lightweight Forward Assist for AR15
Rugged & Lightweight Forward Assist Upgrade From Strike The Strike Industries Lightweight Forward Assist is an upgrade for AR15 builds, bringing both ergonomics and aesthetics. The unique desighn gives your...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 DevicesAR-15 Handguard Accessories
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