Polymer Lower Parts Kit (LPK)

Rated 4.67 out of 5 based on 3 customer ratings
(3 customer reviews)


  • Manufacturer: New Frontier Armory
  • Model: Polymer Lower Parts Kit (LPK)
  • -Dealer Price will appear in cart when logged in

Out of stock - Join the waitlist to be emailed when this product becomes available

SKU: LPK-LW Category:


Polymer Lower Parts Kit

  • Manufacturer: New Frontier Armory
  • Model: Polymer Lower Parts Kit (LPK)
  • Compatible With: All Standard Mil Spec AR-15 Lower Receivers AND LW-15 Polymer Lower Receivers

The New Frontier Armory Polymer Lower Parts Kit (LPK) has everything you need to complete your stripped AR-15 Lower Receiver except a stock kit and trigger guard.

Included in this kit is the following polymer parts (unless noted otherwise):

  • Magazine Catch Spring (metal)
  • Selector Spring (metal)
  • Takedown Pin Detent Spring (metal)
  • Pivot Pin Detent Spring (metal)
  • Buffer Retainer Spring (metal)
  • Bolt Catch Spring (metal)
  • Disconnector Spring (metal)
  • Trigger Spring (metal)
  • Hammer Spring (metal)
  • Trigger Pin (metal)
  • Hammer Pin (metal)
  • Bolt Catch Roll Pin (metal)
  • Bolt Catch Detent
  • Selector Detent
  • Takedown Pin Detent
  • Pivot Pin Detent
  • Pistol Grip
  • Pistol Grip Screw (metal)
  • Pistol Grip Lock Washer (metal)
  • Pivot Pin
  • Takedown Pin
  • Buffer Retainer (metal)
  • Bolt Catch (metal)
  • Magazine Catch
  • Magazine Catch Button
  • Trigger
  • Hammer
  • Disconnector
  • Selector

These kits are perfect for building out your stripped polymer lower receiver or for a lightweight build you’re working on with any standard AR-15 lower receiver.

**NOTE: These kits contain the same parts we use at the factory for our LW-15 Complete Polymer Lower Receiver and DO NOT contain a trigger guard.

The New Frontier Armory Polymer Lower Parts Kit (LPK) is proudly MADE IN THE USA by hard working American men and women.

Additional information

Weight .25 lbs
Dimensions 4 x 4 x 1.5 in

3 reviews for Polymer Lower Parts Kit (LPK)

  1. Rated 4 out of 5


    Worked as advertised and described. All the parts fitted without a problem. I did have a problem with the selector detent but it was replaced quickly by NFA and solved the issue. I was able to lose a couple .oz off a lightwieght build. The LPK has held up to 800+rds of abuse. I will order from New Frontier Armory again.

  2. Rated 5 out of 5

    mpftech@4gunlovers.com (verified owner)

    Just what I wanted, everything was just excellent. Fit, finish and quality is far above average. Helped me build the ultimate lightweight rifle! Thanks New Frontier Armory.

  3. Rated 5 out of 5

    Ronald Killips (verified owner)

    Precise fit. Unimaginable that poly can be made into such critical parts. Molding and fit were perfect with the exception of very minor adjustment with a needle file. What’s next
    , could new frontier armory come out with a tough poly carbine buffer tube so I can shave even more weight or maybe a poly delta ring?

Add a review

You may also like…