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UTG Pro AR15 Ops Ready S4 Mil-spec Stock Kit
As Low As $59.97 Save Up to 14%
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Most Helpful Positive Review UTG Pro buffer tube
Nice quality mil spec buffer, the price of the kit is comparable to just the buffer tube from other manufacturers. The buffer spring feels a bit cheap and is not a smooth in the tube as some buffer springs that are even in the $10-20 dollar range. Overall nice quality.
Most Helpful Negative Review disappointed with the design
I bought this because it was the complete set i needed and its made in the USA. The overall quality was satisfactory with all the components. I was disappointed with the design of the butt stock. The lever thats used when you adjust the atock is held in by a pin that's not captive to the stud it i...
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S4 pro stock

by Riskydabs, Verified Owner from CA, United States Written on May 17, 2025
Awesome stock easy installation and honestly i like this stock over my Magpul furniture on my other Rifle came with everything needed and the fitment is super snug and the stock has virtually zero to little play between the stock and the buffer unlike the Magpul that can rattle definitely sticking to these UTG Stocks
Pros:
  • Snug
Cons:
  • Zero
Best Used for:
  • home defeanse
Would recommend: Yes
Was it helpful to you? Yes | No

I bought two, one works and one doesn't

by Black Eye, from TX, United States Written on August 29, 2024
I think this is a decent stock however one that I bought does not securely lock in place in the fully extended position. It seems secure in the farthest position but suddenly slides up a notch when firing. This is disconcerting and causes the slide not to recoil properly, jamming a round halfway into the chamber. I swapped out to the second stock purchased and everything is fine. I haven't been able to figure out why the first one fails based on simple observation. For the price I can tolerate tossing one but check yours thoroughly on the range before trusting this unit on your go-to gun
Pros:
  • Sturdy
  • minimum slop
Cons:
  • Failure to feed
Would recommend: Yes
Was it helpful to you? Yes | No

buffer stock kit

by Bee, Verified Owner from AZ, United States Written on June 18, 2024
I like this kit especially for the price it functions well is smooth looks good have yet to use the rifle its on but will do that soon.
Would recommend: Yes
Was it helpful to you? Yes | No

great for the price

by Bee, Verified Owner from AZ, United States Written on June 14, 2024
Perfect for what i needed install was easy and it looks good. Better then some that cost more.
Would recommend: Yes
Was it helpful to you? Yes | No

buy the stock only. forget the kit.

by mike, Verified Owner from WV, United States Written on December 8, 2021
I purchased two of these kits and upon first inspection everything seemed legit. When the tube was installed on the lower i noticed it was slightly canted after tightening the castle nut. When removed you could see where the endplate had cut into the threads. I assumed i had done something wrong so i used the second kit and it had the same issue. When a cheap tube was used from a takeoff there was no issue. I found i could literally turn the endplate into the threads with very little force so the aluminum has to be super soft. The stock itself is very nice so far. The bare stock can be had for around 20 bucks. The tubes i used with no issue were a brand like je machine or tacfire. For roughly the same price you can piece this together and save a lot of headache. Fortunately i have a lot of spare parts laying around...
Would recommend: No
2 of 2 found the following review helpful.
Was it helpful to you? Yes | No

Leapers UTG PRO AR15 S4 Mil-spec Stock Kit good quality one quibble

by DC, from VA, United States Written on January 18, 2021
The Leapers UTG PRO AR15 Ops Ready S4 Mil-spec Stock Kit feels high quality. It doesn't have a lot of slop or rattle like some of the cheaper stock kits. The rubber pad on the stock is comfortable enough. The one issue is that the charging handle can bump the cheek rest.
Would recommend: Yes
2 of 2 found the following review helpful.
Was it helpful to you? Yes | No

Clean look

by Bankskustom, Verified Owner from FL, United States Written on December 31, 2020
I have this on a 20" valkyrie and am very impressed. It is very comfortable and holds recoil very well for its size. Gives an excellent look for a streamlined build. Leaves a little bit more of the buffer tube exposed than others that also has a good look when you have a colored or stripped buffer like mine.
Pros:
  • All
Cons:
  • None
Best Used for:
  • Any build
Would recommend: Yes
Was it helpful to you? Yes | No

Something different

by Ryan, from AZ, United States Written on December 5, 2020
Was looking for something different at a good price. Came across these and really like the design, function and quality. I would absolutely buy these again. Everything went together as it should with no problems.
Would recommend: Yes
3 of 3 found the following review helpful.
Was it helpful to you? Yes | No

Threads broke when tightening

by Upset, from PA, United States Written on October 4, 2020
Threads broke off the buffer tube when screwing in and ruined my lower..super upset that this happen. I purchased 2 and didn’t even open the 2nd package yet. Both are being returned....................
Would recommend: No
1 of 4 found the following review helpful.
Was it helpful to you? Yes | No

not my thing

by Damon, from TX, United States Written on August 22, 2020
I won't say that it is a bad item. It is sturdy and fit on my lower very well, I have to say I am not a big fan of the stock. It is very short, it does not cover all of the adjustment slots on the buffer. And for me it, a man with rather long arms, it just did not work well. It is built well though.
Would recommend: No
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No
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