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
Sort
Filter
Show In-Stock Only?
Price
Brand
- Uppers & Parts - AT3 Tactical (23)
- Uppers & Parts - Aero Precision (16)
- Uppers & Parts - Luth-AR (15)
- Uppers & Parts - Strike Industries (9)
- 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)
- Uppers & Parts - Range Tool (2)
- Uppers & Parts - JP Enterprises (2)
- Uppers & Parts - Fortis (2)
- 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)
- Uppers & Parts - Magpul (1)
- Uppers & Parts - Ergo (1)
- Upper Receivers - Bravo Company (1)
Caliber
Color
- Uppers & Parts - Black (56)
- Uppers & Parts - Flat Dark Earth (31)
- Uppers & Parts - OD Green (13)
- Uppers & Parts - Burnt Bronze (9)
- Uppers & Parts - Tungsten (8)
- Uppers & Parts - Blue (7)
- Uppers & Parts - Red (7)
- Uppers & Parts - Gray (7)
- Uppers & Parts - Purple (6)
- Upper Receiver Parts - Gold (5)
- Upper Receiver Parts - Silver (5)
- Uppers & Parts - Pink (5)
- Uppers & Parts - Titanium (5)
- Upper Receivers Parts - Stainless (4)
- Upper Receivers & Parts - Brown (2)
- Upper Receiver Parts - Desert Tan (1)
List
Grid
-
AT3™St. Patty's 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™St. Patty's 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™St. Patty's 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... -
AT3™St. Patty's 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™St. Patty's 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™St. Patty's 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™St. Patty's 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™St. Patty's 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™St. Patty's 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™St. Patty's 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™St. Patty's 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™St. Patty's 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™St. Patty's 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 -
St. Patty's Sale
CMMG 9mm and 22LR Ejection Port Dust Cover Kit with Gas Deflector
Ideal Ejection Port Cover For 9mm and .22LR with Gas Deflector The CMMG 9mm Ejection Port Dust Cover Kit is a drop-in replacement for your standard ejection port cover ideal... -
AT3™St. Patty's 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™RECOMMENDEDSt. Patty's Sale
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 -
St. Patty's Sale
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 -
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... -
St. Patty's Sale
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 -
NEW
Aero Precision Stripped M4E1 Threaded Upper for AR-15
Billet Looks with All Forged 7075-T6 Construction The Aero Precision M4E1 threaded upper receiver brings all the reliability and parts compatibility of a classic forged upper, with the looks of...5 Options5 Options5 Options -
St. Patty's Sale
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 -
NEW
Aero Precision Stripped M4E1 Slick Side AR-15 Upper Receiver
Stripped M4E1 Slick Side Upper for Lightweight AR-15 This stripped upper from Aero Precision uses all forged 7075-T6 construction, and drops the forward assist for a slicker, lighter weight upper...2 Options2 Options2 Options -
NEW
Yankee Hill Machine Dust Cover Assembly with Caliber Markings
Yankee Hill Machine Dust Cover Assembly with Caliber Markings This precision-engineered dust cover not only enhances the aesthetics of your firearm but also serves a crucial functional purpose. Laser-engraved caliber markings...3 Options -
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
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