Lifetime Warranty Lifetime Warranty Made in the USA Made in the USA FREE Shipping on $300+

Free Shipping on all orders $250+

300 Blackout Upper (16" Barrel & Keymod Handguard) AR 15 Complete Rifle Upper
$499.95 $389.95 (You save $110.00)
Larger / More Photos

Free Shipping on all orders $250+


SKU: UA300CHB1618(P).750-(12)LWKM

Please allow up to two weeks for your order to ship due to high demand

Ready to finish your 80 lower build or general AR lower with one of the most affordable, dual-purpose, mil-spec, complete uppers on the market? Our 16" 300 Blackout Rifle Upper with 12" Keymod Handguard is your answer. Featuring a Picatinny top rail, next-generation Keymod handguard, and 5/8 x 24 muzzle thread pitch, this upper provides the best of both worlds for attachments - on top of offering the ability to quickly suppress without the need to change gas systems.

Mil-Spec Quality and Accuracy

This complete 300 Blackout Rifle Upper is manufactured from mil-spec 4150 Chromoly steel, offering superior barrel life and accuracy. Every barrel is built with the intent of providing 1 MOA accuracy at 100 yards (if you can manage, of course). This particular upper's Heavy Barrel profile is guaranteed to tack nails, featuring a carbine gas system to reliably cycle any 300 Blackout load, light or heavy. Hand-built in the USA, every upper features a standard flat top M4 upper receiver with Type III Hard Coat Anodized finish (mil-spec), M4 feed ramps, and a USGI A2 Birdcage flash suppressor.

300 Blackout Barrel Features:

  • 300 AAC Blackout Chamber
  • 16" with Parkerized Finish
  • 4150 Chromoly Steel
  • Heavy Profile
  • 1:8 Twist Rate
  • 5/8 x 24 Thread Pitch
  • A2 Birdcage Flash Suppressor

300 Blackout Upper Receiver Features:

  • 12" Lightweight Keymod Handguard
  • Carbine-Length Gas System (0.125 Hole)
  • Low Profile Gas Block (0.750)
  • M4 Flat Top Upper
  • M4 Feed Ramps
  • Carbine Gas Tube
  • Charging Handle
  • Chrome-lined BCG

Ships Direct to Your Door!

The best thing about any AR is that only a finished lower receiver counts as the firearm. This full-built, ready-to-fire upper requires no FFL transfer, no paperwork, no fees - it ships straight to your front door! All you have to do is pin it to your lower and you're ready to hit the range or hunt hogs. Because everything's pre-built, you're guaranteed a safe-to-fire weapon, too. No dealing with pins and gas blocks, no worrying about head spacing. Simple.

300 Blackout Upper (16" Barrel & Keymod Handguard) AR 15 Complete Rifle Upper

$499.95 $389.95 (You save $110.00)
Secure Checkout

Free Shipping on all orders $250+