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.300 Blackout AR-15 Pistol Kit - 8.5" Barrel, 1:8 Twist Rate with 9" Lightweight MLOK Handguard

$579.99
SKU:
5165449733_5165448884
Availability:
In stock! Ships in 1 - 3 business days!

By now, the word is out: 300 Blackout works well with shorter barrels, especially in pistol configurations.  Subsonic .300BLK rounds also love when you add a suppressor to those shorter barrels.  Do it up with this build kit.

To start, you get a prebuilt upper assembly with an 8.5-inch barrel with a 9" lightweight MLOK handguard.  You also get a few upgrades.  We junked the regular A2 pistol grip and threw in a Magpul MOE grip and trigger guard.  We also melted down that old stock trigger and replaced it with a better, polished one.  Also, just for giggles and, well you know the other thing, we threw in the SBA3 adjustable pistol brace from SB Tactical.

What’s Included

This kit is not a firearm. It includes an assembled upper receiver, bolt carrier group, lower parts kit, and buffer assembly with pistol brace. 

New builder? Here's how to build an AR-15.

AR-15 (300 BLK) Pistol Kit Specs

Barreled uppers are assembled in-house before shipment.

Barrel

  • Chamber: .300 AAC Blackout
  • Contour: Heavy
  • Length: 16”
  • Twist Rate: 1:8
  • Gas System: Pistol
  • Muzzle Threads: 5/8x24
  • Feed Ramps: M4
  • Material: 4150 CMV
  • Finish: Parkerized
  • Process: Button Rifled
  • Lining: None
  • Extension: .30-Cal
  • Muzzle: Fluted Flash Can

Handguard

  • Attachment System: 9" Lightweight M-Lok
  • Finish: Type III Hardcoat Anodized (Mil-Spec)
  • Top Rail: M1913 Picatinny
  • Material: Billet 6061-T6 Aluminum
  • Attachment: Barrel Nut 

Upper Receiver

  • Profile: M4 Flattop
  • Material: Forged 7075-T6 Aluminum
  • Finish: Type III Hardcoat Anodized (Mil-Spec)

Bolt Carrier Group

  • Profile: M16/Full-Auto
  • Steel: Carpenter No. 158 (Mil-Spec)
  • Exterior: Black Nitride
  • Interior: Black Nitride
  • Gas Key: Staked
  • Charging Handle: Included

Lower Receiver Parts

  • Buffer System: Mil-spec, Carbine
  • Pistol Brace: SB Tactical SBA3
  • Parts Kit: Mil-spec, single-stage

Lower Receiver not included.

WARNING: Handling firearms parts and accessories can expose you to lead and other petroleum products known to the State of California to cause cancer and reproductive harm. For more information go to: www.P65Warnings.ca.gov

Shipping Restrictions

Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories or "assault weapons" (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. We try our best to keep our shipping page current, but laws change daily.

GunBuilders.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.

Caliber:
.300 AAC Blackout
Barrel Size:
8.5"

We are a national retailer of individual components and not all products depicted on this website are legal in every state. Shipping of various products found on this website are prohibited to some states (such as California, Connecticut, District of Columbia, Hawaii, New Jersey, New York, Rhode Island, and Washington). The information, pictures, text or products presented on this website are not a representation by us, and should not be understood by you, that any product or completed firearm is legal to assemble or own in your state of residence. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative.