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CMC Triggers Complete Lower Receiver Parts Kit for AR-15
$69.99 $39.99 Save 43%
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Most Helpful Positive Review Great lower parts
I already had a grip and firing group so I was looking for a LPK that didn’t include those parts. This was the obvious choice for me. Quality parts to match my CMC Lantac drop in trigger at an awesome price. I would recommend the parts to anyone.
Most Helpful Negative Review worst parts kit ever
This is one of the worst parts kits I've ever used. I've built close to 1500 Completed rifles and have never seen such low quality. Oversized roll pins, out of spec safety, out of spec detents, out of spec springs, out of spec bolt catch. The trigger guard looks almost like polymer I can't actually ...
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Works great in two different lowers!

by Interested, Verified Owner from OR, United States Written on November 18, 2025
I used this in a SilencerCo and H&R M16A2 lower receiver. The parts are sorted into bags, like springs, push pins, trigger guard and so on, so watch a video if you’re not familiar with each component. I was expecting a flat trigger guard like other budget kits, but got a nice thick, angled, glove style. Impressive for the price. Everything fit well, but the trigger guard roll pin was tight in my blemished H&R. Maybe H&R’s fault. Got it in with roll pin punches. (I didn’t need the mag catch or trigger guard on the SilencerCo lower receiver, but did use the mag catch roll pin.) It comes with a safety selector and I put an old CMC single stage 3.5 pound trigger in the SiCo and it pairs well.
Pros:
  • Price
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No

poor quality

by Sam, Verified Owner from TX, United States Written on October 4, 2025
Overall, the kit was poor quality. The only good part is it was cheaper than others. Since this wasn't for me and the person who's lower it was going on did not care as price was the determining factor it works. The pins were the wrong size. had to use my own bolt catch pin from my spare parts. Everything else just felt cheap. The trigger guard looked and felt cheap. The stock military trigger guard looks and feels higher quality. Stay away from this kit for any serious build
Pros:
  • Cheap
Cons:
  • everything
Would recommend: No
Was it helpful to you? Yes | No

Lol it was my fault

by jc, Verified Owner from TX, United States Written on May 27, 2025
Found these on sale...a great sale...buuut apparently the sale ended the day before I pulled the trigger, thats why I say "my fault"..past that no complaints with opticsplanet or the product
Would recommend: Yes
Was it helpful to you? Yes | No

affordable LPK

by hooked2fly, Verified Owner from KY, United States Written on October 22, 2024
Nice affordable LPK all parts were well machines. Came with a nice winter trigger guard no pictured!
Pros:
  • afforable
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No

decent kit

by Andrew, Verified Owner from MO, United States Written on April 10, 2024
Solid kit, had the parts i needed at a decent price.
Would recommend: Yes
Was it helpful to you? Yes | No

Very nice lower build kit

by Joel Tipton, Verified Owner from MS, United States Written on February 28, 2024
This kit was well put together and i already have a love affair with their drop in triggers and this build kit did not disappoint I strongly recommend it for the quality of the machine work at this price point you cant beat it.Pair this kit up with a 3lb CMC trigger and your lower build will be all that you want it to beAnd as always ordering from Optics was a great experience.
Pros:
  • Good Quality well made
  • good price
Cons:
  • None especially at price point
Would recommend: Yes
Was it helpful to you? Yes | No

Parts kit for custom build

by RAY RICE, Verified Owner from OH, United States Written on February 13, 2024
Parts all fit perfectly as advertised. Arrived in a timely fashion. Used with standard ar build.
Would recommend: Yes
Was it helpful to you? Yes | No

Good lower parts kit

by RD, Verified Owner from WI, United States Written on February 3, 2024
I’ve bought this lower parts kit before and have had no problems. The parts are to spec and work appropriately. They dont have any sort of non-standard finish or extra polishing, and they come loose in a plastic bag. Other more expensive kits have each individual part sealed separately and labeled (or have different coatings that are largely just for looks and not functionality). The lack of labeling may make a difference to you if it is your first build or you are unfamiliar with the different parts that make up a lower parts kit. Either way, there are plenty of other resources out there help you assemble a stripped lower, small parts labeled or not. For the price and overall serviceable quality, you should have no concerns about buying this product.
Pros:
  • Price
Cons:
  • Parts not identified
Would recommend: Yes
Was it helpful to you? Yes | No

Mil-Spec and it works

by Teddy Rivera, Verified Owner from FL, United States Written on January 31, 2024
Can’t beat it for the price! It simply works on a Mil-Spec lower. If you’re using an Anderson I can see where it may be difficult as lower quality lowers may differ.
Pros:
  • simple to set up & use
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No

Basic, but good

by Andy, Verified Owner from MN, United States Written on November 25, 2023
I just wanted the basics and this is what this is. Nothing extra and it's perfect for what it is.
Would recommend: Yes
Was it helpful to you? Yes | No
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