Home » Shop » AR Parts » Mil-Spec AR15 Lower Parts Kit (w/ Hammer and Trigger)

Mil-Spec AR15 Lower Parts Kit (w/ Hammer and Trigger)

(127 customer reviews)

$39.99

92 in stock

Ships next business day

Financing available on $300+ orders

Specifications

Attributes Value
Weight 0.69 lbs
Dimensions 6 × 6 × 3 in
Platform

AR15, AR9

Caliber

.223 Wylde, .300 AAC Blackout, 5.56, 6.5 Grendel, 9mm

SKU: AR15-LPK

Description

Want an AR-15 trigger that suffers no creep, take-up, or over-travel? Looking for the easiest-to-install LPK? How about the most affordable parts kit possible? This mil-spec AR-15 LPK comes in at a great price with machining and performance that feels match-grade.

Polished for Performance

Inside this kit, you’ll find a disconnector, hammer hook, and sear that were laser-cut and polished to break as clean as glass at exactly 4.5 pounds.

The trigger affords perfect reset after every pull, with no break-in required. Every roll pin presses easily, while the hammer and trigger pins glide in with little effort.

Complete AR-15 LPK with Pistol Grip

This AR-15 Lower Parts Kit includes all components required for assembling your AR-15 stripped lower receiver:

  • Bolt Catch
  • Bolt Catch Plunger
  • Bolt Catch Roll Pin
  • Bolt Catch Spring
  • Buffer Retainer
  • Buffer Retainer Spring
  • Disconnector
  • Disconnect Spring
  • Steel Hammer
  • Hammer Pin
  • Hammer Spring
  • Magazine Catch
  • Magazine Catch Button
  • Magazine Catch Spring
  • Pistol Grip (A2 style)
  • Pistol Grip Lock Washer
  • Pistol Grip Screw
  • Pivot Pin
  • Pivot Pin Detent
  • Pivot Pin Detent Spring
  • Selector
  • Selector Detent
  • Selector Detent Spring
  • Takedown Pin
  • Takedown Pin Detent
  • Takedown Pin
  • Detent Spring
  • Trigger
  • Trigger Guard
  • Trigger Guard Roll Pin
  • Trigger Pin
  • Trigger Spring

Required Tools

To install all the components listed above, you’ll need a pair of roll pin punches and a gunsmithing hammer. An Armorer’s Wrench is recommended for installing the buffer assembly (sold separately, see details below).

Grab everything you need from our Gunsmithing Tools.

Easy-to-Follow Install Instructions

First time assembling, or need assistance with certain steps? Check out our in-depth instructional and picture guide. It shows the full LPK assembly with tips and tricks, including tools required and the buffer tube and castle nut install.

Buffer Assembly Sold Separately

This lower parts kit does not include a buffer tube, stock or brace, nor a buffer or recoil spring. Those components can be purchased here.

Finishing Your Custom AR-15 Build

This lower parts kit is compatible with retail-bought stripped lower receivers and fabricated AR-15 80% lowers. Learn what other parts you need to finish your AR-15 with our Beginner’s Build Guide.

 

Additional information

Weight 0.69 lbs
Dimensions 6 × 6 × 3 in
Platform

AR15, AR9

Caliber

.223 Wylde, .300 AAC Blackout, 5.56, 6.5 Grendel, 9mm

127 reviews for Mil-Spec AR15 Lower Parts Kit (w/ Hammer and Trigger)

  1. Michael Lindsey –

    Lower parts kit

    US

    Great products

  2. Leonard West –

    LPK

    US

    Great for the money!

  3. Arch Stockton –

    Good stuff

    US

    Very good, parts and price were very a God by.

  4. Jeffrey Weatherby –

    Great value

    US

    Quality parts for a mil spec build. Can’t go wrong.

  5. Mark Burden –

    Lower Parts Kit

    US

    Although mil-spec, attention has been paid to the details. Trigger and sear nicely ground, no casting flash on any parts, and no knife edge on any pressed parts. All looks and fits great, and the price is awesome.

  6. James Nealey –

    Lower parts complete kit

    US

    Shipping was quick. Everything looked good in kit everything you need to complete your lower. I am not sure if I will keep the trigger that came with it. It has a really gritty rough pull. Would have gave it 5 stars if not for the bad trigger.

  7. Robert Pettit –

    Great Buy, Great Service!

    US

    My first ever purchase at 80% Lowers. Great price, service and fast shipping! I’m building my first AR-15 and looking forward to seeing how these Mil-Spec parts fit and function. The look excellent and I’m a fan of the A2 military style grip. I’ll be buying from this business again!

  8. Kaleb Achee –

    Great kit

    US

    Everything looks, fits, and operates great

  9. Brittany Hahn –

    M

    US

    It’s slightly confusing with out color coded bags or something of the sort. Feels quality

  10. Joseph Church –

    super fast shipping

    US

    Received with in 3 days. I did have to file ever so lightly on the disconnector due to a hang up on the hammer causing it not to reset. Over all very satisfied with 80% lower products. I have purchased from them for several years and a few rifle kits. Thanks so much.

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Warning: Handling firearms parts and accessories can expose you to lead and other petroleum products known to the State of California to cause cancer and reproductive harm. For more information go to: www.P65Warnings.ca.gov

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