AR UPPERS
At AR15Parts.com, we specialize in custom-built AR Uppers crafted with precision using only the highest quality components from leading manufacturers. Our AR-10 and AR-15 complete upper is fully customizable with matched options for optics, rails, muzzle devices, bolt carrier groups, charging handles, and magazines.
We offer a wide range of popular AR15, AR10/LR308 and AR9/PCC calibers including 204 Ruger, 22 ARC, 223 Wylde, 224 Valkyrie, 243 Winchester, 260 Remington, 300 Blackout, 308 Winchester, 350 Legend, 450 Bushmaster, 458 SOCOM, 50 Beowulf, 5.56 NATO, 6.5 Creedmoor, 6.5 Grendel, 6.8 SPC II, 7.62x39.
AR Uppers For Sale
19 Subcategories
How to Choose an AR Upper
Step 1: Determine Your Primary Use
Your intended application drives every other decision. Home defense builds favor shorter barrels (10.5"–11.5") in 5.56 NATO or 300 Blackout for maneuverability. Hunting applications need caliber selection based on game size—350 Legend and 6.5 Grendel for deer, 450 Bushmaster or 458 SOCOM for larger game. Competition and long-range shooting benefit from 6.5 Creedmoor, 6mm ARC, or 224 Valkyrie with 18"+ barrels.
Step 2: Match the Platform to Your Lower
AR-15 uppers fit mil-spec AR-15 lowers. AR-10/LR308 uppers require the corresponding large-frame lower—and pattern matters (DPMS vs. Armalite). Confirm your lower's pattern before ordering. If building from scratch, we recommend DPMS-pattern for wider parts compatibility.
Step 3: Select Barrel Length & Gas System
Barrel length affects velocity, accuracy, and legal requirements (under 16" requires SBR registration or pistol configuration). Gas system length should match barrel length for reliable cycling:
- Pistol gas: Under 10" barrels
- Carbine gas: 10"–16" barrels
- Mid-length gas: 14"–18" barrels (softer recoil)
- Rifle gas: 18"+ barrels
Step 4: Choose Your Barrel Profile & Material
Government and M4 profiles balance weight and heat dissipation. Heavy/bull barrels improve accuracy but add weight. For barrel steel, 4150 CMV offers durability for high-volume shooting, while 416R stainless provides better precision for match applications. All our Satern and Shaw barrels are button-rifled for superior accuracy.
Why Shooters Choose AR15Parts.com
Custom-Built in Texas: Every AR upper is assembled by our gunsmiths in Denison, TX—not drop-shipped from overseas. We inspect, headspace, and function-test before shipping.
Premium Components Only: We use barrels from Wilson Combat, Ballistic Advantage, Satern, and Shaw. Upper receivers from Aero Precision. BCGs and charging handles from BCM, Radian, and Geissele. No cheap parts, ever.
True Customization: Configure your exact build online. Choose barrel length, handguard, muzzle device, BCG, and charging handle. We assemble it to your specs.
Fast & Free Shipping: Orders over $99 ship free. Most uppers ship within 3-5 business days.
Lifetime Warranty: We stand behind our work. If something's wrong, we make it right.
Frequently Asked Questions
What is included in a complete AR upper?
Our complete AR uppers include the upper receiver, barrel, gas block, gas tube, handguard, and muzzle device—fully assembled and headspaced. Bolt carrier group (BCG) and charging handle are available as add-ons during configuration. You'll need your own AR-15 or AR-10 lower receiver to complete the rifle.
Do I need an FFL to buy an AR upper?
No. AR uppers are not considered firearms under federal law and ship directly to your door. Only the serialized lower receiver requires an FFL transfer. This means you can order your upper today without any paperwork or waiting period.
Will this upper fit my AR-15 lower?
Our AR-15 uppers fit any mil-spec AR-15 lower receiver. AR-10 uppers require an AR-10/LR308 pattern lower—check whether yours is DPMS or Armalite pattern before ordering, as they're not interchangeable. If you're unsure, contact us with your lower's brand and model.
What's the difference between 5.56 NATO and 223 Wylde?
223 Wylde is a hybrid chamber that safely fires both 5.56 NATO and .223 Remington ammunition while optimizing accuracy for .223 match ammo. If you shoot primarily 5.56 mil-spec ammo, either works. If you want the flexibility to shoot precision .223 loads accurately, choose 223 Wylde.
What caliber is best for deer hunting with an AR?
For whitetail deer within 200 yards, 350 Legend offers excellent terminal performance and is legal in straight-wall cartridge states. 6.5 Grendel extends effective range to 400+ yards with better ballistics. For larger deer or longer shots, 6.5 Creedmoor or 308 Winchester in an AR-10 platform provides more energy on target.
How long does it take to ship a custom upper?
Most in-stock configurations ship within 3-5 business days. Custom builds with special barrel lengths or configurations may take 2-3 weeks. We'll email tracking information as soon as your order ships. Orders over $99 qualify for free shipping.
Do your uppers come test-fired?
Every complete AR upper is headspaced and function-checked before shipping. We verify proper gas system function and bolt lockup. This ensures your upper is ready to run out of the box when paired with a quality BCG and lower.