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.300 Blackout AR 15 Rifle Kit - 16" Stainless and Black Nitride Fluted Heavy Barrel, 1:8 Twist Rate with 12" M-Lok Handguard, Side-Charged

MSRP: $520.00
Was: $649.99
Now: $489.99
( saved $30.01 )
SKU:
UASCH300CHB1618SSBCF-12M3_AR15-LPK_M4-STOCK_AR15-BTA
Availability:
Out of Stock
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Note: 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.

If you're into the idea of building your own AR-15 chambered in .300BLK (.300 AAC blackout), then you're in the right place. If your aim is to build one whose appearance stands out, then check out this .300BLK built kit. At its core you have a 16-inch stainless steel barrel that's been coated in black nitride and given bear claw fluting to set it apart from the rest. Plus, it's side-charging, so your new creation won't be boring. It's also got a 12" free-floating M-Lok handguard on which to mount your light, laser, or whatever else.

Plus, we give you most of the extras you'll need to complete the whole kit. You get a mil-spec buffer tube assembly and butt stock that adjusts in the standard six positions and of course a mil-spec lower parts kit.

What’s Included 

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

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

300 Blackout AR Kit Specs

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: Stainless Steel and Black Nitride
  • Process: Button Rifled
  • Lining: None
  • Extension: M4
  • Muzzle: A2 “Birdcage” Flash Hider

Handguard

  • Attachment System: 12" 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 rceiver sold separately.

Shipping Restrictions  

We cannot ship certain parts and accessories to states that prohibit the sale or ownership of such components, like California, New York, and others. Before ordering, see our shipping restrictions for a list of all prohibited states and locales. We try our best to keep our shipping restrictions current, but state laws change almost daily. It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm.  

80LowerJig.com only ships within the United States. Federal law prevents international shipments of our products.  

WARNING: Handling firearms parts and certain firearm 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, visit www.P65Warnings.ca.gov. 

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.

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

Caliber:
.300 AAC Blackout
Barrel Size:
16"
Barrel Steel:
4150 CMV
Twist Rate:
1/8
Handguard Type:
Free-float
Gas System Length:
Carbine-length
Barrel Finish:
Stainless Steel
Barrel Finish:
Nitride

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.