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™ 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™ AR 15 Ejection Port Cover C Clip -2pcs
AT3™ AR 15 Ejection Port Cover C Clip 2 pcs of AR-15 ejection port cover c-clips. These parts are guaranteed to fit and function in your AR and are perfect... -
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... -
New
GrovTec AR-15 Crush Washer 5 Pack – 1/2 Inch
Grovtec 1/2 Inch Crush Washers Grovtec's 1/2 inch crush washers come in handy when you're experimenting with different muzzle devices. These turned crush washers fit onto the muzzles of 1/2x28... -
New
GrovTec AR-10 Crush Washer 5 Pack – 5/8 Inch
Grovtec 5/8 Inch Crush Washers This five pack of Grovtec's 5/8 inch crush washers work great for your .30 caliber muzzle devices. These washers secure your muzzle device on barrels... -
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... -
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 -
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
Mil-Spec AR-15 Handguard End Cap Made of stamped steel, with .750 " diameter barrel opening Backed by the AT3 Lifetime Warranty -
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. ... -
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 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... -
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... -
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 -
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... -
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... -
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 -
UTG Quick Install Dust Cover
A Tool-Free Replacement Dust Cover For 223/5.56 Mil-Spec Rifles The UTG Quick Install Dust Cover is an ideal replacement dust cover kit for .223/5.56 caliber rifles. This piece offers a... -
New
Aero Precision M4E1 Enhanced AR-15 Upper Receiver with Forward Assist
Enhanced M4E1 Upper with Internal Barrel Nut The Aero M4E1 Enhanced Upper has a unique design and core function that separates it from standard AR-15 uppers. Instead of the typical...2 Options -
Aero Precision Assembled XL Upper Receiver for Big Bore AR-15 – Enlarged Ejection Port
AR-15 Upper for Big Bore Calibers - .450 Bushmaster, .458 SOCOM, .50 Beowulf If you're planning a big bore build for your AR-15, one area that often goes overlooked is...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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