by
Retrorob,
Verified Owner
from NY, United States
Written on March 1, 2026
I am a novice in the AR15 construction field.
I had been waiting a few months for an Aero Precision lower parts kit and I was told it would be at least a few more months before I saw the kit.
I did some research on-line and found this to be an excellent substitute.
Everything fit together perfectly.
The only issue I had was the rear take down pin.
The kit does not come with a necessary set screw for setting the detent.
That set screw is a standard 4-40 x 1/8". Buy a couple because you may lose (launch) one in the assembly.
Also, don't tighten down that screw. It will put too much tension on the pin.
Tighten it down just to the point it is flush with the lower and check the pin play.
If you need more tension then you can crank it a bit.
Don't worry about the screw coming out, the buffer tube end plate will hold it in place.
While I'm offering tips, use a utility knife to compress the pivot pin spring and detent (another potential launch issue).
I set up an empty box with a towel inside and "aimed" both springs at the box while installing them. It definitely saved me from losing the pivot detent during one of those launches.
Cons:
- Does not come with 4-40 x 1/8" set screw.
Would recommend: Yes
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by
Builder,
Verified Owner
from FL, United States
Written on February 27, 2026
All of the parts in this kit work. I managed to get the grip on. It has been a while since I built an AR-15 and I don't recall the last grip I ever installed being as tight as this one is. I suppose it is a good thing that it is tight since there won't be any movement. If the screw came out it would probably stay on for many more shots lol. I'm not sure if the grip is supposed to be that tight, but I did get it to work. All in all, this kit is definitely worth getting for your next AR build. I take back what I said about OP as in the moment it seemed as if a low quality product was being knowingly pushed, but it does work. just keep wiggling it until it goes on if you have the same issue.
Would recommend: Yes
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by
Builder,
Verified Owner
from FL, United States
Written on February 27, 2026
I'm not sure why, but it sure feels like there are second-hand products on this store from flawed inventory as if its known about. My main complaint is the grip. Everything else seems to fit properly, but why is the grip so tight that it won't go onto any of my lowers? I have tried to put it on two different lower receivers and it shaves plastic off of the grip as I attempt to put it onto the receivers. Why are you guys selling products that have known defects? These products are obviously poor QC products that are being sold second hand, or atleast it sure appears that way. Now I'm a bit concerned for placing orders here as I'm spending a lot of money. If the products are going to be poor QC batches I will start shopping somewhere else.
The 1 star is because a product is being sold that has poor quality and isn't disclosed in the description that the item has flaws.
-Trigger & Hammer installed properly
-The grip is so tight that its obviously a bad part
Would recommend: No
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by
CueBall,
Verified Owner
from NC, United States
Written on February 15, 2026
Maybe I'm biased, but I like BCM. The kit has everything to put the lower together. Grip feels good, as well as the trigger guard. No issues here with this kit. Price is not bad either
Would recommend: Yes
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by
JH,
Verified Owner
from MI, United States
Written on February 15, 2026
Have used this BCM parts kit on a couple builds. No issues.
Would recommend: Yes
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by
Painterwithtisum,
Verified Owner
from PA, United States
Written on February 9, 2026
Building my 1st AR and this is the baseline of quality you want for your builds.
Would recommend: Yes
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by
Thomas,
from MD, United States
Written on December 27, 2025
Fit, finish, performance is great with any parts from BCM. I have used these parts on several builds and have never had an issue.
Would recommend: Yes
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by
TheAntiCupid,
Verified Owner
from MS, United States
Written on August 8, 2025
The parts are standard lower receiver parts. The grip is good. The trigger is great value for the price of this parts kit.
Would recommend: Yes
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by
D,
Verified Owner
from CO, United States
Written on April 19, 2025
Great product fair prices. I’ve bought 2 of these now and they work perfectly. Optics planet also has the best deal I’ve found on these! Thank you
Would recommend: Yes
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by
Seth,
Verified Owner
from NH, United States
Written on April 13, 2025
Bcm is an awesome company everything is milspsc everything I needed to finish my stripped lower
Would recommend: Yes
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