Aero Precision AR-15 Standard Lower Parts Kit

Manufactured by Aero Precision
SKU: APRH100029
MPN: APRH100029
Manufactured by Aero Precision
21 Reviews

In Stock

Standard orders will ship out within 2 business days or less. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.



The Aero Precision Lower Parts Kit includes everything you need to assemble a stripped lower receiver. This AR lower parts kit with MIL-SPEC dimensions and coatings ensure the highest quality and correct component interface.

Kit includes:
  • Takedown/pivot spring
  • Takedown/pivot detent
  • Trigger/hammer pin
  • Takedown pin
  • Pivot pin
  • Bolt catch
  • Bolt catch spring
  • Bolt catch buffer
  • Bolt catch roll pin
  • Safety selector
  • Safety selector spring
  • Safety selector detent
  • Buffer retainer
  • Buffer retainer spring
  • Trigger guard
  • Trigger guard roll pin
  • A2 pistol grip
  • Pistol grip screw
  • Pistol grip lock washer
  • Trigger spring
  • Hammer spring
  • Disconnector spring
  • Magazine catch body
  • Magazine catch spring
  • Magazine catch button
  • Hammer
  • Trigger
  • Disconnector

Aero Precision takes some of the most state of the art manufacturing techniques and equipment derived from their work in the aerospace industry and applies it to their products in the firearms industry. They have utilized their knowledge from years of building aircraft components to design and engineer AR-15 handguards, receiver sets, scope mounts, and more. They treat every product as if it were a precision flying machine and adhere to strict quality standards to ensure law enforcement, military, and civilian customers receive a product they can rely on.
See More


BrandAero Precision
Manufacturer.Aero Precision
Weight7.5 Oz

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see


by -

Fit my Anderson lower like a champ. No filing necessary. Works great out of the box. Will buy again.

Surprisingly decent trigger

by -

Didn't think the trigger would be any good. I've had a couple rifles, a spikes and a DDM4v5 LW, both purchased new as complete rifles straight from the manufacturers. The stock GI triggers sucked, even more on the Daniel Defense than on the Spikes. Lots of grittyness and creep, but I was surprised to find that this GI trigger that comes with this LPK is actually pretty crisp, with barely any creep or takeup. No grittyness, although it is a bit heavy of a pull which is to be expected.
<br>It's definitely not a Geissele or Timney, but it's definitely not bad for a basic GI trigger out of an LPK.

parts fell out of shipping box.


well during shipping the bag in the box busted open. lost some small parts smh. not to happy about that at all
<br>From PA: You didn't leave your contact info. Give us a holler and we will square you away.

Save your money


This is without a doubt the worst looking lower parts kit I have ever seen. I've used rock river psa and cmmg among others in the past and up til now I thought the psa was the worst (rock river the best). I have a job that requires me to mic parts figure grind angles and back cut bore angles (my experience reference). The 1st thing I did was pull out the fire control group and that's when I saw the casting issues. large voids in the grind surfaces(air pockets formed during poor casting) which are easily visible in low light with the naked eye at distance. The next thing I noticed were the grind angles on the sear interface which are not flat or cut with any precision at all look like my 6 year old ground them. I'm a fan of aero's upper and lowers and I'm also a primary arms fan and order from them when ever possible. That said if I were Aero I would be ashamed to put my name on these. PA should pull them send em back.

Great Kit


I have purchased a couple of these. Everything is satisfactory about this lower parts kit. The trigger is much better smoother crisp and maybe a bit lighter overall than the triggers in 3 Palmetto kits I have assembled into rifles.

Good lpk


I installed this kit in my Anderson lower everything fit nice and easy and has a crisp clean trigger pull. No complaints on my end

Bent bolt catch


I ordered 2 of these because they were out of spikes lower kits. 1 had a bent bolt catch. It was so bad the catch ground the finish off my lower. I didn't notice until it was installed. I've built 9 lowers and this was the worst parts kit I've used. Trigger is horrible compared to spikes and palmetto lower parts kits.

No problems here.


Good quality LPK for the price. Trigger is as expected for the price though.

Very nice set!


Everything fit perfectly into my lower receiver! No issues at all and will definitely recommend!

Very pleased


Excellent customer service from Primary Arms who responded to a question with both a phone call and an email. The LPK dropped right in and operates perfectly.