Lifetime Warranty Lifetime Warranty Made in the USA Made in the USA FREE Shipping on $300+

Free Shipping on all orders $250+!

300 Blackout AR Pistol Kit (8.5" Barrel & 7" Keymod Handguard) with 80% Lower
$999.95 $789.95 (You save $210.00)
Larger / More Photos

Limited time offer. Save 12% OFF now!

Use coupon code:StartMyBuildFor 12% OFFClick to Copy

Free Shipping on all orders $250+!



300 Blackout AR Pistol Build Kit Specs:

Hand-guard Type: Keymod
Chamber: 300 AAC Blackout
Twist Rate: 1:7
Rail Length: 7"
Barrel Length: 8.5"
Barrel Steel: Chrome Moly
Barrel Finish: Nitride
Barrel Profile: A2
Muzzle Device: A2 Flash Hider

Building your own AR pistol has never been easier or more enjoyable! Now you too can build your own personal AR-15 pistol at home when you are ready to enjoy it. Our complete AR Pistol Build Kit comes with an 80% lower which will allow you to build a complete firearm in the comfort and privacy of your own home and to further develop your skills as a home gunsmith.

Suitable for beginners or skilled home builders, this 300 Blackout AR-15 Pistol build kit is everything you need to assemble your own hard hitting .300 Blackout AR pistol. Featuring an 8.5” barrel and a KeyMod handguard that allows mounting almost any sort of tactical accessory, this ready to build pistol kit only requires you finish the 80% lower, install the lower parts kit, and pop the upper receiver into place before enjoying your very own custom built AR-15 pistol! It’s easier and more rewarding than one would think and fun for the whole family.

300 Blackout AR Pistol Build Kit Specs (Expanded):

Barrel: 8.5", 300 AAC Blackout chambered barrel comes complete with an A2 flash hider.

Upper Receiver: This US made upper receiver is carefully forged from 7056- T6 aluminum, and finished with a durable hard black anodized finish. Built with standard M4 feed ramps and T-marked on the top rail.

Bolt Carrier Group: Made of 8620 steel, this chrome line, phosphate coated bolt is mil-spec shot peened for optimal hardness. The Carpenter 158 steel bolt carrier comes complete with extractor spring and O-ring insert. This high pressure tested full auto-style bolt carrier is built for extreme duty operations.

80% Lower Receiver: Formed from a 7075-T6 aluminum forging, our FIRE/SAFE marked black anodized and forged 80% lower is a perfect match for our upper receiver assembly. This 80% lower only needs machined for the trigger pocket, and fire control group.

AR-15 Lower Parts Kit: The MagPul MOE lower kit gives you everything you need to complete your lower assembly, including safety, pivot pin, ultra slick nickel finished trigger group, standard latch plate and the unbelievably comfortable MagPul MOE pistol grip.

Lower Assembly: Our Shockwave Pistol Lower Build Kit includes the cutting edge, accuracy enhancing Shockwave Blade stabilizer and Shockwave tube designed around the unique needs of AR-15 pistol builds.

Charging Handle: Made from durable T6061 aluminum, our charging handle is built for rugged reliable performance.

Please note:The AR Pistol Build Kit only requires that you complete the 80% lower yourself. This is the best part, and allows you to enjoy the challenges and rewards of making your own personal lower at home at your own pace.

It is your responsibility to fully understand all applicable laws and regulations regarding purchase and ownership of uppers with a barrel length of less than 16".

No FFL Required Made In The USA Lifetime Warranty

300 Blackout AR Pistol Kit (8.5" Barrel & 7" Keymod Handguard) with 80% Lower

$999.95 $789.95 (You save $210.00)
Secure Checkout

Limited time offer. Save 12% OFF now!

Use coupon code:StartMyBuildFor 12% OFFClick to Copy

Free Shipping on all orders $250+!

Customer Reviews

Based on 4 reviews
5 Star
4 Star
3 Star
2 Star
1 Star
Write a Review Ask a Question
  • Reviews (4)
  • Questions (0)

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Ideal for any operator

"This 300 Blackout Pistol Kit is ideal for any operator. It shipped fast, and when I got it in, the packaging was perfect so that none of the materials were damaged, which is an issue I�۪ve run into with other companies. This kit in particular is ideal because it is an all inclusive bundle, making it easier to build because you don�۪t have to worry about any missing parts. I�۪ve always wanted to build my own AR-15, and this kit was affordably priced for my first build, and not to mention the skill set needed to build this particular model. It was easy to build, easier than I expected, I would definitely suggest to any operator to try this Blackout Kit. "


Absolutely love this AR pistol kit

"Absolutely love this ar pistol kit. Shipped fast, got it in and I�۪m pleased with the look of the materials. The matte black finish looks sleek, especially with the A2 flash suppressor and nitride barrel. All of the weapon�۪s individual parts are well manufactured, and the building process was very simple and easy to follow."

jason west

pumped to get in and get started!

"I ordered the 300 Blackout Kit and it shipped very fast, pumped to get it in and get started! "


Stoked That it is bundled

Just ordered one of these build kits. Super stoked to find everything bundled together. Great price too! I can't wait to get it!