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  1. Very Impressed!
    Overall, I can’t say enough good things about this kit. It was easy to install, everything fit perfectly in my lower. And didn’t require any major hammering filing or massaging of the parts to get them installed. Overall I would definitely Recommend this package to anyone.

    Review by

    Posted on

  2. A2 Grip Scuffed up
    Parts kit was fine, everything appears in order, however the A2 pistol grip was scratched up and was visually unappealing. Very poor finish. I recommend getting it without the pistol grip or budgeting for a better one down the road.

    Review by

    Posted on

  3. Good but requires some massaging
    Great kit, has everything you need and trigger is decent especially for price range.

    Disconnector required being timed to allow proper operation. This was determined after confirming the trigger pins were correct dimensions in the lower receiver.

    TNA were more then willing to send out a replacement part without hesitation. I just put it down to part of the building experience.

    Review by

    Posted on

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Lower Parts Kit (LPK) for AR-15

96% of 100
In stock
688715046561 688725

All internal parts you need to complete a stripped AR-15 lower receiver, except the buttstock assembly. Comes from an OEM factory that supplies these and other small parts to many big brand names.

If you are building an AR lower, you may be interested in our handy Vice Block.

  • Mil-spec
  • Comes in an unmarked polybag from an ISO 9001:2008 military contractor
  • Total weight 220g

You get:

  • (1) Trigger
  • (1) Trigger spring
  • (1) Trigger pin
  • (1) Hammer
  • (1) Hammer spring
  • (1) Hammer pin
  • (1) Disconnector
  • (1) Disconnector spring
  • (1) Bolt catch
  • (1) Bolt catch plunger
  • (1) Bolt catch spring
  • (1) Bolt catch roll pin
  • (1) Fire selector
  • (1) Selector detent
  • (1) Selector detent spring
  • (1) Pivot pin
  • (1) Takedown pin
  • (2) Takedown detents
  • (2) Takedown springs
  • (1) Buffer retainer 
  • (1) Buffer retainer spring
  • (1) Magazine catch
  • (1) Magazine catch button
  • (1) Magazine catch spring
  • (1) Trigger guard assembly
  • (1) Trigger guard retaining pin
  • (1) A2 pistol grip
  • (1) Slotted attachment screw
  • (1) Star lock washer

    (31 pieces in total)

    Compatible with:

    • All AR-15 lowers and clones
    • Plastic, aluminum and other metal lowers

    Installation Difficulty:

    Installation Notes: Building a lower is really easy, just be patient. You will need some oil, pin punches and possibly a soft-faced hammer for light tapping. Needle nose pliers help to hold the pins and you can use other punches as guides.

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