ORDERS SHIP BY THE NEXT BUSINESS DAY!
Real time inventory. No backorders.

.300 Blackout AR-15 Pistol Kit (8.5” Barrel 1:8 Twist & 9” Lightweight MLOK Handguard)

$699.99
SKU:
5165449733_5165448884
Availability:
Ships Next Business Day

Description

Wanna squeeze more performance out of your .300 AAC blackout AR when it comes to subsonic rounds?  If you plan to get a suppressor, then you need this AR build kit chambered in .300 BLK! Its shorter barrel when paired with a suppressor makes an excellent means of slingin’ lead downrange. This build kit starts with an upper assembly made of an 8.5 inch barrel with a 9 inch lightweight M-Lok handguard.  You also get a lower parts kit that comes with a polished trigger for a little smoother performance, a Magpul MOE grip, and the SBA3 adjustable pistol brace by 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. It does not include the component to make a firearm: A stripped lower receiver. Pair this rifle kit with an AR-15 80% lower receiver and AR-15 jig to fabricate a receiver, sold separately.

Here's the beginner's guide to 80% lowers.

300 BLK Pistol Kit Specs

Barreled uppers are assembled in-house before shipment.

Barrel

  • Chamber: .300 AAC Blackout
  • Contour: Heavy
  • Length: 8.5"
  • Twist Rate: 1:8
  • Gas System: Pistol
  • Muzzle Threads: 5/8x24
  • Feed Ramps: .30-Cal
  • Material: 4150 CMV
  • Finish: Parkerized
  • Process: Button Rifled
  • Lining: None
  • Extension: M4
  • Muzzle: Fluted Flash Can

Handguard

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

Stripped 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: Phosphate Coating
  • Interior: Chrome-Lined
  • Gas Key: Staked, Chromed
  • Charging Handle: Included

Lower Receiver Parts

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

Receiver sold separately

No FFL or serialization is required to fabricate a receiver under federal law. However, state laws vary. Some states require serialization or have banned 80% lowers and gun-making kits. We encourage each and every builder to perform their own research about the state and federal laws that apply to them.

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

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

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.