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Ever wanted to build a complete AR-15 from scratch? Well, now you can with our complete AR-15 build kit! This kit includes all the parts, jigs, and drill bits needed to complete the Polymer80 80% lower, and the rest of the TacFire parts kit. Best of all, it can ship straight to your doorstep since the lower is not completed and requires finishing.


The RL556v3™ features Polymer80’s proprietary polymer composite, a solid core design, flared magwell, and beefier mil-spec buffer tube housing. The pistol grip area features a unique threadless design specific to Polymer80 rifle lowers.

The kit includes:

  • 80% Polymer AR15 Lower Receiver (Mil-spec)
  • Polymer Jig
  • Trigger Hole Drill Guide
  • Drill Bits and End Mill

TacFire's AR-223 Unassembled pistol build kit includes a black parkerized barrel with a 1:7 twist rate, 1/2x28 A2 flash hider; a Slim M-Lok free-float handguard; 7075-T6 billet aluminum stripped upper; 5.56 bolt carrier group; Mil-Spec charging handle, dust cover, forward assist, heavy buffer, pistol length gas tube, low profile gas block; complete pistol buffer tube, A2 black pistol grip and lower parts kits all made in the USA. This 223 Wylde model has a 7.5" barrel and 7" handguard.

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  • Short Round Supply Co. makes sure you won't find a better deal on your favorite shooting gear, firearms accessories, optics, or ammunition anywhere else.
  • Generally speaking, Short Round Supply doesn't require buying in bulk to get our best possible price. Here, we think you should be able to buy boxes of ammo at bulk pricing!
  • All ammo pricing is per the box. Any reference to a case is made for informational purposes only.  Bulk ammo deals requiring a minimum purchase will only allow the minimum qty of boxes to be placed in your Range Bag.
  • It is the Buyer's responsibility to ensure that any products are legal to own in your local area.
  • We cannot ship certain products to some locations. Please check our Terms and Conditions for a detailed list 
  • Unless otherwise noted above, this product is eligible for our SuperSonic Shipping Guarantee
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You're reviewing:Polymer 80 Build Kit W/ TacFire PK223LPK7S AR 223 Wylde Pistol Build Kit W/ Lower Parts Kit 7.5" Parkerized Barrel
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