AR- 15 Pistol Lower Build Kit in Black

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PSA MOE Pistol EPT Lower Build Kit - Black - 516445077

In stock

Special Price $ 89.99

Regular Price: $ 129.99

Quick Overview

WARNING: This product can expose you to the chemical lead, which is known to the State of California to cause cancer and reproductive harm. For more information go to (CA Health and Safety Code Section 25249.6).

SKU: 516445077
UPC: 516445077
MFR#: 516445077


  • MOE grip
  • MOE Trigger Guard
  • Palmetto State Armory MOE EPT (Enhanced Polished Trigger) Lower Parts Kit
  • Pistol buffer tube
  • Pistol tactical latch plate
  • Carbine buffer spring
  • PSA Carbine buffer

Everything you need to turn your stripped lower into an AR-15 pistol lower.

**Buffers may vary in finish, color, and may or may not have a PSA logo, depending on product availability.

Add To:

A high quality lower build kit with everything you need to assemble your AR-15 lower into a pistol.
Features black oxide coated hammer and trigger springs.

**Buffers may vary in finish, color, and may or may not have a PSA logo, depending on product availability.


Enhanced PolishedTrigger 
Trigger Spring 
Enhanced Polished Hammer 
Hammer Spring 
MOE Grip 
Buffer Retainer Pin 
Buffer Retainer Spring           
MOE Trigger Guard 
Safety Selector 
Bolt Catch Spring 
Detent Spring 
Bolt Catch Plunger
Pistol Buffer Tube
Carbine Buffer Spring
Carbine Buffer


Bolt Catch
Disconnecter Spring
Magazine Catch Spring
Bolt Catch Roll Pin
Magazine Release Button
Magazine Catch
Pivot Pin
Selector Spring
Safety Selector Detent
Rear Take Down Pin
Takedown Pin Detent
Pistol Latch Plate

Everything you need to turn your stripped lower into an AR-15 pistol lower! 

SKU: 516445077
SKU 516445077
Department Build Kits & Parts Kits
Brand Palmetto State Armory
Daily Deal No
Daily Deal Expires No
Unit Price N/A
Youtube Video No
Free Shipping? No
Free Shipping Qty Label No
Free Shipping Qty No
SKU: 516445077

Questions and Answers

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Browse 1 question Browse 1 question and 7 answers
Do you need a castle nut to complete a pistol lower?
JDfromTexas on Nov 23, 2018
BEST ANSWER: Depends on the buffer tube. The one that PSA includes in the kit does not need a castle but. You just screw it in until it stops. Personally, I’m not a fan of this because it can twist back out. If you try to put a brace on it, it will compound the problem. If you run the pistol with a bare tube then you won’t have much of a problem. I suppose blue thread locker would help the issue.


4.3 / 5.0
7 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great kit
Everything looked great went together perfectly and functions nicely.
July 13, 2019
2 months ago
Needs a buffer tube locking nut
Good kit. I like the trigger. I did in fact receive the fluted buffer tube unlike a few other reviewers. I didn't like that the kit didn't come with a buffer tube locking nut so when I upgraded to a SBA3 brace I needed to buy a separate nut. Then I needed to buy anti-walk pins because the ones in this kit just slipped in and out about 1mm per 50 rounds. Too loose for me. Other than that everything is working great!
Fluted buffer tube
Fluted buffer tube
March 25, 2019
7 months ago
Not a fluted buffer tube
Not a bad kit but photo shows fluted buffer tube, which would have matched my fluted flash can, but received a smooth buffer tube. Contacted PSA about it and they sent me the wrong one again. Wrong parts and long wait times have pretty much ruined PSA for me.
May 24, 2018
1 year ago
Great Fit and Quality
Everything that was supposed to be there was in the box and packaged separately according to function. That was especially nice since this was my first lower build and it made finding the right parts a lot easier. Fit of the parts in my PSA stripped lower was perfect and it has performed flawlessly so far.
Completed Lower
Completed Lower
April 29, 2018
1 year ago
Great trigger! Sweet build!
The lpk came missing a roll pin and a decent spring. Called PSA and haven't heard anything back so I bought some to finish the build. Swapped the buffer tube for a kak brace. Topped it with the 10.5" 223 wylde upper and it shoots so nice! I love this trigger!
Swapped out to  kak brace. But I love this trigger!.
Swapped out to kak brace. But I love this trigger!.
April 27, 2018
1 year ago
Great parts kit...
I have several of these lower kits and all work flawlessly. Regarding the comment that the kit doesn't come with a castle nut a castle nut is not always a required component as the buffer tube tightens securely through the end plate to the receiver housing. If using something like a KAK buffer tube where you need to maintain a specific position a castle nut allows you to properly position the tube in the correct orientation then lock it in place with the castle nut. For a round buffer tube you can rotate to any position and sufficiently torque it into position. I have this kit on several 223/556 and 7.62x39 pistols from 7 inch to 10.5 inch barrels and no loosening issues to date. Again a great value on this kit as the EPT trigger kit is $30 on sale the buffer tube assembly is $30 on sale and the Magpul grip and trigger guard add another $30 meaning you are paying $10 for the remaining lower parts. Plus FREE SHIPPING if you watch closely.
December 21, 2017
Enjoy it but with some annoyances
Put this on an Anderson lower and had an issue with the functions check. I have to push the trigger forward to get a pop. The rear trigger pin is a bit too loose for my liking but that could very well be the lower. The trigger is single stage just so you know. It would be five stars for everything if it came with a castle nut(essential) and the trigger would pop when it's supposed to. On a lower quality kit I got a castle nut. I say fix those two things and the rest is great.
April 29, 2017

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