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KAK AR-15 Lower Parts Kit
$55.00 $44.50 Save 19%
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Most Helpful Positive Review Lower parts kit
Good parts. Everything fit together nicely. Quality is as good as any other brands that I have used. Bought because it was lowest price I could find at the time for and will purchase again when needed. Just wish there was another option than FedEx on shipping. They always manage to screw up delivery...
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Most Helpful Negative Review This is not an AR 15 parts kit
This is not an ar 15 parts kit it is an incorrectly labeled AR 10 that they call an AR 15 parts kit. Its confusing because they call it AR15-LP-KT-010 then they state it as KAK .308.... on an ar 15 title.... its screwy. They should had labeled it AR10...
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Rust/low quality.

by Disappointed, Verified Owner from GU, United States Written on December 16, 2025
Parts came coated in surface rust that was visible prior to opening the packaging. The casting on the trigger was poor. Imperfections on the trigger and the finish was uneven. You really do get what you pay for.
Pros:
  • Cheap
Cons:
  • Cheap
Would recommend: No
Was it helpful to you? Yes | No

Out of Spec

by Xzavier Rojas, Verified Owner from CA, United States Written on November 11, 2025
I was excited to build my wife’s ar-15 unfortunately they’re out of spec.
Very disappointing bc it’s a KAK lower parts kit seems very good but the mag release parts were terrible and every spring couldn’t fit where intended to fit, also seems like I had missing parts maybe I was going crazy to fit the parts still looked like I was missing parts.

For anyone looking for a lower parts kit on a budget please save up a bit more for higher tier lower kit that are to spec so you won’t have a headache like I did building my wife’s at-15.

I went to my local gun store got a S&W lower kit and everything fit perfectly just a heads up guys on my experience with this KAK lower parts kit.
Would recommend: No
Was it helpful to you? Yes | No

almost perfect. but with a frustrating problem

by M, Verified Owner from UT, United States Written on March 25, 2025
I got the kit and overall it was pretty good. Only problem was the mag catch plunger. It's out of spec, just a bit too large and thusly very tight. I figured with enough oil it wouldn't be a problem. Well, now my lower can't keep it up so to speak and it's gonna be a gigantic pain to try and extract this plunger past that, the kit was pretty nice. Maybe you'll have better luck than me.
Would recommend: No
Was it helpful to you? Yes | No

Good value.

by Sparky, Verified Owner from WI, United States Written on March 22, 2025
This is a nice kit! All parts were there and fit good. I was especially impressed with the trigger group.
Pros:
  • Trigger gr
  • Trigger Group
Cons:
  • None
Would recommend: Yes
0 of 1 found the following review helpful.
Was it helpful to you? Yes | No

2.5 stars actually, one part is out of spec

by JFlo, Verified Owner from NE, United States Written on March 21, 2025
So I'll was about to give this 4 stars but nah. The bolt catch plunger was over sized. Would not fit in any of my lowers, you basically had to sand it down to make it fit. So I give it 2.5 stars actually... because I had to drive to a LGS and purchase a oops kit that cost me another 15 bucks. Basically I could have got a better know brand instead of this. Gas + driving distance + wasting my time for something I should have not even do. Everything else was fine, until installing the bolt catch. 15 bucks for that one little piece! I mean, I could have ordered one just by itself, around 1 dollar or whatever, shipping, then wait again.... but nah... still this made me mad.
Would recommend: No
Was it helpful to you? Yes | No

Good not great- Missing pin.

by MAGA Patriot, Verified Owner from FL, United States Written on January 22, 2025
It's a pretty straight forward lpk. Everything assembled as it should in a psa lower.My only complaint is there wad a missing a pin for the trigger guard.
Pros:
  • Affordable
  • installed and aligns easily
Cons:
  • missing a key part to install on rifle
  • Cheaper quality
Best Used for:
  • budget build AR
Would recommend: Yes
Was it helpful to you? Yes | No

Great LPK, no complaints.

by Clarence M, Verified Owner from TN, United States Written on December 26, 2024
It is exactly everything it should be. No more, no less.
Would recommend: Yes
Was it helpful to you? Yes | No

Exactly what you need and nothing you don't.

by Clarence M, Verified Owner from TN, United States Written on December 19, 2024
This value LPK is really nice. Everything is quality and solid.
Would recommend: Yes
Was it helpful to you? Yes | No

Lower parts kit

by Manimal, Verified Owner from CA, United States Written on December 11, 2024
It’s a quality parts kit at a very affordable price. I highly recommend this kit
Would recommend: Yes
Was it helpful to you? Yes | No

Perfect Item!

by Gary Surratt, Verified Owner from WV, United States Written on October 8, 2024
Very happy with this item! Happy with the performance of the Optic Planet crew! It doesn't get any better than this. Thank you.
Pros:
  • All pros
Cons:
  • No Cons
Best Used for:
  • AR15
Would recommend: Yes
Was it helpful to you? Yes | No
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