.300 Blackout AR 15 Rifle Kit – 16″ Parkerized Heavy Barrel, 1:8 Twist Rate with 15″ M-Lok Handguard

$349.99

SKU: 637N-UA300PHB1618P-15M3_AR15-LPK_M4-STOCK_AR15-BTA Category: Tag:

Description

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.

For the longrange shooter who demands a do-it-all AR with a .30-cal. This 300 Blackout build kit provides a lightweight rifle that can shoot suppressed or un-suppressed with supers and subs all day (and night, for the hogs). With a 16″ barrel forged from 4150 CMV with a 1:8 twist providing optimal velocity and stability for all grains and loads, this rifle kit yields MOA accuracy in any configuration.

Barrel

  • Chamber: .300 AAC Blackout
  • Contour: Heavy
  • Length: 16”
  • Twist Rate: 1:8
  • Gas System: Pistol
  • Gas Port: 0.750”
  • Gas Hole Dia.: 0.070”
  • Muzzle Threads: 5/8×24
  • 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: Black Nitride
  • Gas Key: Staked
  • Charging Handle: Included

Lower Receiver Parts

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

 

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.

stamped_io_product_reviews_new:
a:9:{s:6:”widget”;s:8527:”

Barrel Size:
16″
Caliber:
.300 AAC Blackout
hide_cart_button:
CT,NY,NJ,PA,WA
Twist rate:
1/8
Barrel Finish:
Parkerized
Handguard Type:
Free-float
Gas System Length:
Pistol-length
stamped_io_product_reviews_new:
a:9:{s:6:”widget”;s:8527:”

Barrel Size:
16″
Caliber:
.300 AAC Blackout
hide_cart_button:
CT,NY,NJ,PA,WA
Twist rate:
1/8
Barrel Finish:
Parkerized
Handguard Type:
Free-float
Gas System Length:
Pistol-length

Frequently Asked Questions

How fast is shipping?
Orders ship within 3 business days to your selected Michigan FFL dealer with full tracking info.
Where can I pick up my firearm?
Pickups are at licensed FFL dealers in Michigan. Use terms like “gun shop near me in Michigan” or “FFL dealer in Michigan” to locate one.
Do I need a permit or license?
For handguns, residents must obtain a License to Purchase (unless they already hold a CPL). Long guns from FFL dealers require no additional permits—per Michigan law.
Can I carry this concealed or openly?
Michigan is a “shall-issue” state for concealed carry at age 21+. Open carry is allowed without a permit, except in vehicles or specified locations :contentReference[oaicite:20]{index=20}.
Is this .300 Blackout AR 15 Rifle Kit - 16" Parkerized Heavy Barrel, 1:8 Twist Rate with 15" M-Lok Handguard right for me?
Our .300 Blackout AR 15 Rifle Kit - 16" Parkerized Heavy Barrel, 1:8 Twist Rate with 15" M-Lok Handguard is ideal if you’re shopping for: .300 Blackout AR 15 Rifle Kit - 16" Parkerized Heavy Barrel, 1:8 Twist Rate with 15" M-Lok Handguard, AR Build Kits. Great options for both beginners and experienced owners.
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Frequently Asked Questions

How fast will my order ship?
We ship all orders within 1-3 business days to your licensed Michigan FFL dealer. Tracking info will be emailed.
What is your return policy?
Non-firearm items can be returned within 14 days unused. Firearms sales are final after FFL transfer. See full return policy.
Is the .300 Blackout AR 15 Rifle Kit - 16" Parkerized Heavy Barrel, 1:8 Twist Rate with 15" M-Lok Handguard suitable for me?
Our .300 Blackout AR 15 Rifle Kit - 16" Parkerized Heavy Barrel, 1:8 Twist Rate with 15" M-Lok Handguard is popular among Michigan customers for personal defense and sport shooting.

Shipping Policy

We process all orders within 1-3 business days. All firearms are shipped directly to your chosen licensed FFL dealer in Michigan. Tracking information will be emailed once shipped.

Shipping times may vary depending on your FFL dealer and location within Michigan.

Good news! We can ship this product to Columbus, Ohio within 3 business days.

Return & Refund Policy

Returns are accepted within 14 days for non-firearm items, provided they are unused and in original packaging. Firearms sales are final once transferred to your FFL dealer.

Please contact our support team for assistance with returns.