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300 Blackout Freedom Build Kit (16″ Barrel and Fixed Front Site) with AR15 Fire/Safe 80% Lower

$650.00 $500.00 (You Save $150.00)

300 Blackout Freedom Build Kit (16" Barrel and Fixed Front Site) with AR15 Fire/Safe 80% Lower
Save For Later
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Free Shipping on all orders $325+!

SKU: 516447001


300 Blackout Freedom Build Kit with AR15 Fire/Safe 80% Lower

Building a tried and true M4 platform, a perfect clone of the venerable USGI rifle has never been easier or more affordable. 

At just over $500, this kit gets you everything you’d find on a military-issue M4: Polished feed ramps, an M16 bolt carrier group with a Carpenter 158 bolt, government profile, chrome moly barrel, A2 front sight post with pistol length pre-installed gas system, A2 birdcage flash hider, forged upper receiver, and a mil-spec phosphate hard coat finish.

A mil-spec lower parts kit accompanies a six-position buttstock and carbine buffer system and a quality 80% lower, everything needed to finish your at-home build! This kit is 100% legal to ship straight to your front door, no FFL transfer or paperwork needed. Nothing in this kit is considered a firearm by any state or federal law. If you were looking for the most affordable way to build a quality M4 platform rifle, you’ve found it.


  • Barrel – Length 16″ .300 AAC blackout 1:7″ twist
  • Barrel Steel- Chrome moly barrel steel
  • M4 Profile Barrel 
  • M4 Feedramps 
  • Upper Receiver – Forged 7075 aluminum 
  • M16 Bolt Carrier 
  • Carpenter 158 Bolt 
  • Lower Receivers – Fire/safe engraved 80% forged lower – 7075 aluminum
  • Classic Lower Parts Kit

Why the PTAC Kit Rocks

  • 100% legal to ship to your front door
  • Requires no FFL transfer or paperwork to own
  • Complete M4 clone from muzzle to buttstock
  • Forged upper and polished feed ramps
  • M4 chrome moly barrel offers mil-spec accuracy
  • Freedom lower build kit provides a quality trigger
  • All you need to finish a rifle is an 80% lower!

Need a California-Compliant Build Kit? Follow These 4 Steps!

1. Choose “CA-Compliant Lower Parts Kit” in the Lower Parts Kit dropdown.

2. Choose the “No Lower Receiver” option for the 80% Lower Receiver dropdown.

3. Select/Click “Add to Build”.

4. Head here to purchase a California-compliant 80% lower receiver

    Please note: This AR-15 Build Kit requires that the builder completes the 80% lower receiver themselves, but that’s the fun part (and the only way to build your own AR-15 without the need of an FFL transfer or serialization).

    No FFL required Made in the USA Lifetime Warranty

    300 Blackout Freedom Build Kit (16″ Barrel and Fixed Front Site) with AR15 Fire/Safe 80% Lower

    $650.00 $500.00 (You Save $150 )

    $650.00 $500.00 (You Save $150 )
    Save For Later
    Save For Later

    Free Shipping on all orders $325+!

    Customer Reviews

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    John C.

    Great quality and easy to build!

    The Kit was perfect and well made. Shot straight and true out the box! Also bought a 5.56 barrel and it fit perfectly on the lower so now I have basically two rifles! I bought the Easy Jig Gen 2 and it was so easy to use. Just make sure you check your bit tightness in the router frequently. Mine came loose and I almost messed up the lower. instructions we easy to read.I just wish there had been instructions with the build kit but they were easy enough to find online. There was a slight delay in shipping but they were true to their word and took care of me very well. Very Happy!


    Easy Process, Great Results

    Just finished building the .300 Blackout kit. This was my first experience building a 80% receiver, I might be hooked! The only things that would've made it excellent, instead of good, would be an unmarked lower option. (I purchased a separate unmarked receiver, which they were happy to discount, because I intended to have custom engravings for safe/fire.) that and a very long Christmas backorder were the only things that were less than perfect. The milling, building, shooting experiences were all extremely satisfying. Still smiling about it now.

    Samuel C.

    My very first rifle build! Couldnt dream of better!

    I have had the most amazing experience with this kit. I have worked in machine shops on CNC lathes and Mills. I milled out my lower with a manual mill, and it is breathtaking, its much nicer than any lower ive seen finished from ghost gunners jigs or any other way, it has gone together so flawlessly and i cant wait to pit lead down range! I will share a picture doing so. It has made medecide tk build a 556 next, then an AR9! Amazing!


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