7.5″ 300 Blackout AR-15 Pistol Build Kit

(10 customer reviews)

Original price was: $349.99.Current price is: $319.99.

Shooting steel case ammunition through our products voids ALL warranties!!!


Disclosure: Handguards will be either keymod or mlok depending on availability. This build kit will come with everything EXCEPT the stripped lower receiver to build a 7.5″ AR-15.

This kit includes:

  • 7.5″ 300 Blackout Barrel (black nitride or stainless steel, twist may vary)
  • 7″ Free-Float Handguard (depending on availability)
  • A2 Flash Hider
  • Pistol Buffer Kit
  • 300 Blackout Full Auto Nitride BCG
  • Either Stripped or Upgraded Billet Upper Receiver (depending on availability) 
  • Forward Assist (where applicable)
  • Dust Cover
  • Steel Gas Block
  • Stainless Gas Tube
  • Standard Charging Handle
  • Complete Lower Parts Kit

All Build Kits Come Unassembled.

KIT notice as of March 1st 2020:

All build kits are subject to change slightly in this time of EXTREME demand. We are not currently able to fill specific spec requests. The kit parts will fall into the general specs above but items such as stocks, handguards, and muzzle devices are changing daily.

Shooting steel case ammunition through our products voids ALL warranties!!!

Additional information

Weight 4 lbs

10 reviews for 7.5″ 300 Blackout AR-15 Pistol Build Kit

  1. Cody irish

    10/10 would highly consider this build kit for anyone new and experienced! It was simple and so much fun to assemble! I matched mine up with a stripped savage msr lower and everything worked great together! The functionality of it is outstanding shoots great no jams no problems! I am beyond pleased with this product and will definitely be buying more kits!

  2. Jeremy B

    Great build kit, great quality. I got a kit and put it together no problem. My buddies liked it so much they came and got a few kits from Durkin as well. They all have nothing but good things to say about theirs too. One of the kits my buddy got even came with an adjustable gas block. How cool.

  3. Matthew John Thompson

    Man this little baby is awesome my first build many more to come. I love it I call it the McNasty my personal home defense gun I’m very pleased with the way she turned out

  4. xerxes_69

    Great build kit I was kinda nervous at first Because of the price but it’s great quality and I highly Recommend this product can’t wait to order more.

  5. Thomas Ansley

    I love it lol can’t wait to get another off this site

  6. Jackie Wilson

    Couldn’t be happier with purchase i ordered on a Tuesday and received my beautiful 300 blk the following Tuesday i will most definitely be a returning customer product was just as shown in pics doesn’t feel cheap at all and is a snug fit on my AAT (Alien Armory Tactical) lower if you’re on the fence about purchasing dont be you won’t regret it staff is helpful and friendly too.

  7. Caleb Colson

    I just got this in, it appears to be High Quality. Mine came with an MLOK Hanguard, Mil-Spec Upper, 4150 CMV 1:8 Barrel, and had the Padding for the Pistol Buffer.
    I have had Good Luck with Durkin Kits!
    Thank you!

  8. 30

    Pretty decent

  9. P80lover

    Do you guys take prepaid cards?

    • Lauren Schneider

      Please send over an email to our customer service team at [email protected]

  10. Joes Builds

    I love my 7.5″ 300 blackout, quickly becoming my favorite gun to shoot, besides ammo costs. If anyone is on the fence if you could build your own AR I suggest you give it a shot. I am a beginner and this was my first complete build and it went great. If you want to see what comes in the box and how to put one together I made a video on mine. Check it out if you are in the fence! This was my first of many Durkin Tactical builds to come.


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