AR-15 Lower Parts Kit

AR-15 Lower Parts Kit

Our AR-15 Lower Parts Kit is a military-spec lower parts kit that includes all components necessary to finish building your AR15 lower receiver. Whether your building a new rifle or just want to stock a spare parts kit, this kit is ideal for both uses.

In stock

Color Black
  • Buy 3 for $39.95 each and save 20%

Description / AR-15 Lower Parts Kit

  • Mil-Spec Fire Control Group (Trigger, Hammer, Disconnector)
  • Mil-Spec spring kit
    • Hammer Spring
    • Trigger Spring
    • Disconnector Spring
    • Pivot Pin Spring
    • Takedown Pin Spring
    • Buffer Retainer Spring
    • Selector Spring
    • Bolt Catch Spring
    • Magazine Catch Spring
  • Mil-Spec Selector
  • Mil-Spec Bolt Catch
  • Mil-Spec Magazine Catch
  • Mil-Spec Small Parts Kit
    • Takedown Pin
    • Takedown Pin Detent
    • Pivot Pin
    • Pivot Pin Detent
    • Trigger Pin
    • Hammer Pin
    • Selector Pin
    • Bolt Catch Roll Pin
    • Bolt Catch Buffer
    • Buffer Retainer
  • Mil-Spec Grip Kit
    • A2 Grip
    • Hex-head screw
    • Lock washer
  • Mil-Spec Aluminum Trigger Guard Kit
    • Trigger Guard
    • Trigger Guard Roll Pin

More Information

Manufacturer United Defense LLC

Customer Reviews

Good Quality at Great Price
Review by Dale
Quality parts at a great price. Complete set of parts because you never know when a spring or clip or ? will just vanish or ? and just ruin your day. Now, not a worry. Also good to have around to replace worn parts during a cleaning or rebuild.
Exellent Price!
Review by Jose
Best price on the web. You will not find a better price anywhere. I just wish they did not run out so quickly!
Great parts for the price!
Review by Henry
I can't tell the difference between these parts and the ones I bought two years ago from a different supplier...and at a much higher cost!
The finish on these are excellent...and they work great. Why pay over $60 from other sellers when you can get them right here at Keep Shooting??
A good deal for the price
Review by Calvin
This is a nice kit for the price. The parts are sent together in one bag but they are all there, they are Mil-Spec and they are of good quality which is really what counts.
Review by ROGER
great value
Review by Brian
You will not find a better lower kit for the price. Budget-minded, but not just for budget builds!
Awesome LPK!
Review by RiderRick
I placed an order for three of these kits back on Dec. 20th & received them on the 26th, great turn around! Agreed they are not CMMG or other high profile parts kits but they are Mil-Spec and work just fine! As far as packaging goes, yes the parts are all packaged loose in one plastic bag but if you take a few extra minutes to lay out the parts in their respective groups you will have no trouble assembling your lower receiver! And as a final thought, all parts were there, nothing was missing! I would give these LPK's an A+ and an A+ for their customer service!
loved the price
Review by Daniel
Nice to have some spare parts
Good quality at an awesome price
Review by WVUncaaMarksman
I bought one of these sets for a spikes tactical lower a few months back. Just installed it, and fit perfectly. Dropped on a .50 Beowulf upper and works great. I did polish up some parts to get an even better trigger release. It didn't really need it out of the box, but I am rather picky in my need for smooth and crisp releases in AR platforms when using mil-spec triggers. Very nice quality and very much on par with higher priced lower parts kits, but at a better price. I liked the fitment and quality so much that I just purchased two more parts kits to have on hand either for future builds or just to have spare parts. I even referred family and friends who are looking for a quality parts kit at a fair price. is quickly becoming one of my go to sources for parts, magazines and other cool items! They are also local to me, which keeps shipping costs very low. You guys rock....keep up the great prices and the available inventory and you guys will get a lot more of my business.
Great Quality and Value
Review by Aaron
I was very impressed with the quality of these lower parts kits. I have paid nearly twice as much for no better quality. The finish on the parts is superior to most name brands that I've used. Check one out. I'm sure you'll agree.
Great Deal at a Super Great Price!
Review by Carl
Great product!
Review by Biggie24420
It's hard to find a LBK for under $40. I got this LBK and all the parts were loose in a plastic bag, but everything was there. The quality is very good. It would have been nice if the parts were packaged separately like CMMG, but again, I had no issues or missing parts.

I was actually impressed with the quality, it's just as good as any other Mil. spec. LBKs in my opinion. I just finished building my stripped lower (Anderson Mfg.) and everything worked out great.

Why pay more for name brand? most of the time you get the same thing but you pay more for a brand name, SAVE YOUR MONEY AND GET THIS LBK!!!!

I have been dealing with keepshooting for a while and I have never had a bad experience. I have spend over $500 with these people and I will continue my business with them.
Wish I had bought more
Review by Larry
Great price. Excellent shipping. Thanks.
Great parts kit, BUT.......
Review by Conrad
Everything went together great, except the roll pin for the bolt catch. I tried everything to get it in, finally had to use sandpaper to get it to the correct diameter so it would fit. I used them on a Rock River Arms lower. Would purchase again to see if it is a common problem.
Great Parts
Review by Jack
Great price
get it before a ban
Review by Marcel
with bans being talked about id get one before its to late

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