AR-15 LPK - Missing Parts Kit

(7 reviews)
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Includes all the little parts that get lost or need replacement during your builds. Keep a set on hand for friends and emergencies. Kit includes:

  • Buffer Retainer - 1 each
  • Takedown / Pivot Pin Detent - 4 each
  • Selector Detent - 2 each
  • Selector / Ejector Detent Spring - 2 each
  • Disconnector Spring - 2 each
  • Takedown / Pivot Pin Detent Spring - 6 each
  • Buffer Retainer Spring - 1 each
  • Bolt Catch Spring - 2 each
  • Bolt Catch Detent - 1 each

All components manufactured in the USA!

Lower Parts Kit


  • 5
    AR-15 LPK- Missing Parts Kit

    Posted by John Gietzen on April 29, 2024

    perfect combination of the various springs and small parts for an AR-15 or M-4 based lower receiver. I could not get the takedown spring or pivot pin spring from Daniel Defense for my ddm4-pdw. But these items fit perfectly to replace those items which either go "sproing" and fly away. or get eaten by the carpet.

  • 5
    Fit perfectly to my mil spec PSA

    Posted by Richard on June 19, 2023

    Very good quality parts will use again ,no problems

  • 5
    Oopsies are inevitable

    Posted by BryanA on April 25, 2022

    Flying springs on the carpet/floor or brass parts on a beige carpet will make you say colorful profanities, keeping spares is a must!

  • 5
    For when the small parts says "sproing!" & thats the last time you see them.

    Posted by Matt on April 1, 2022

    As I get older, and my eyes get worse; kits like this become more and more critical as time goes by. I now have two of these in my parts holder because I'll most likely need it the next time I work on my rifle. These things are like "Band-Aids" they're in the way until you need them.

  • 5
    A Necessity for AR Builders

    Posted by MaineAr on January 24, 2022

    These parts came in handy even the first day I started my build when I dropped some LPK items (only to find them a day later). The springs, detents, etc., all are good quality. A good price for what I received.

  • 5
    Only the Best

    Posted by Msdefense on July 16, 2021

    I have been utilizing KAK's products fir a couple of years now and have been extremely satisfied with everything including this MPK! I am a 7/2 and have used their parts for all of my builds, and will continue to do so!

  • 5
    Nice parts at a decent price.

    Posted by Recondad on July 6, 2021

    This has all the parts that get launched into the twilight zone and you never see again . These are must have spares.