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300 Blackout AR 15 Rifle Kit - 16" Parkerized Heavy Barrel, 1:8 Twist Rate with 15" M-Lok Handguard, Side-Charged

$519.99
SKU:
UASC300PHB1618P-15M3_AR15-LPK_M4-STOCK_AR15-BTA
Availability:
Out of Stock
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Please note: We strive to provide the most accurate photographs of our product wherever possible. Due to availability limitations and supply chain constraints, slight variations of the handguard of this upper assembly may occur in the aesthetics of the skeletonizations in between the M-Lok sections.

This awesome build kit comes to you with a prebuilt upper assembly chambered in .300BLK. The barrel itself is made of 4150 chrome moly vanadium steel and has a 1:8 twist rate. It also comes with a 15" M-Lok handguard for all your tactical accessory-mounting needs. The coolest thing about this kit is its ergonomic side-charging handle: Reach to the side and pull the handle back instead of using the charging handle at the rear of the Picatinny rail.

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 buttstock.

300 Blackout AR 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: Carbine
  • Gas Port: 0.750”
  • Gas Hole Dia.: 0.070”
  • Muzzle Threads: 5/8x24
  • Feed Ramps: M4
  • Material: 4150 CMV
  • Finish: Parkerized
  • Process: Button Rifled
  • Lining: None
  • Extension: M4
  • Muzzle: A2 “Birdcage” Flash Hider

Handguard

  • Attachment System: 15" 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: 9310 Tool, HPT/MPI-tested
  • Exterior: Black Nitride
  • Interior: Chrome-Lined
  • Gas Key: Staked, Chrome-lined
  • Charging Handle: Included

Lower Receiver Parts

  • Buffer System: Mil-spec, Carbine
  • Buttstock: Mil-spec, M4-type
  • Parts Kit: Mil-spec, single-stage

Lower receiver sold separately.

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.

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

Barrel Size:
16"
Caliber:
.300 AAC Blackout
Twist rate:
1/8
Barrel Finish:
Parkerized
Handguard Type:
Free-float
Gas System Length:
Carbine-length

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.