720-299-8991

16" .300 BLK AR-15 COMPLETE UPPER ASSEMBLY

  • $499.95
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Build-to-Spec a Light Weight Duty-Grade Keymod Upper Assembly For Your AR-15 

Made in the USA with a Lifetime Warranty

16" .300 Blackout M4 Profile with Carbine Length Gas & 1 in 7 inch twist

Choose your Handguard, Muzzle Device, BCG, and Charging Handle

Please allow 1-2 weeks for assembly and shipment.

Choose your options below:

Qty:  
  • Weight
    5 lbs
  • SKU
    UP300B16


Please allow 1-2 weeks for shipment.

Build-to-spec a light weight M4 profile keymod upper assembly for your AR-15.  Top Quality US-made components assembled, test fired, and backed with a lifetime warranty.

Choose your bolt carrier in nitride or nickel boron for an extra 30 bucks.  Our BCG's are top-notch!  They are manufactured to extremely high-quality standards by a US government contractor who makes thousands of these a month for some big names out there.  These BCG's have a very low rate of failure and we back them with our lifetime warranty.  You won't find better bolts for the money!

Choices are also offered for the muzzle device.  The standard A2 birdcage flash hider is the most common muzzle device found on the AR-15.  It has slots on the top half so it helps control muzzle rise a little bit and spreads out the muzzle flash somewhat.  For $20 more, the 3-chamber tank-style muzzle brake is much more effective and has aggressive vents on the sides and small ports on the top.  It helps tremendously to reduce felt recoil and muzzle rise for quicker and more accurate follow-up shots.  The trade off is noise.  You won't make any friends next to you at the range shooting with the tank brake!

The standard set-up comes with a mil-spec anodized type III charging handle. Upgrade to a sturdy ambidextrous butterfly charging handle for an additional $15.

These upper assemblies are made-to-order.  Please allow 1-2 weeks for shipment.  

  • HANDGUARD
    • HANDGUARD
      11" FREE FLOAT KEYMOD- D SHAPED END, 15" FREE FLOAT KEYMOD- C SHAPED END
  • MUZZLE DEVICE
    • MUZZLE DEVICE
      STANDARD A2 BIRD CAGE FLASH HIDER, 3-CHAMBER TANK-STYLE MUZZLE BRAKE, NONE
  • BOLT CARRIER GROUP
    • BOLT CARRIER GROUP
      NITRIDE M-16 PROFILE, NICKEL BORON M-16 PROFILE, NONE
  • CHARGING HANDLE
    • CHARGING HANDLE
      STANDARD MIL-SPEC, NONE
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Features your choice of:

1. Barrel

    .223 Wylde M4 Profile 4150 Chrome Moly Vanadium Mag Phos Finish Carbine Gas 1 in 9 inch Twist (included)

    or

    5.56 Nato M4 Profile 4150 Chrome Moly Vanadium Nitride Finish Carbine Gas 1 in 7 inch Twist (+$15)

2. Handguard

    11" (included)  or  15" Free Float Keymod Handguard (+$15)

3. Muzzle Device

    A2 Bird Cage Flash Hider (Included)  or  3-Chamber Tank Style Muzzle Brake (+$20)  or  none (-$10)

4. Bolt Carrier Group

    Nitride M-16 BCG (included)  or  Nickel Boron M-16 BCG (+$30)  or  none (-$80)

5. Charging Handle

    Standard Mil-Spec (included)  or none  (-$15)