Buy the stock only. forget the kit. - UTG Pro AR15 Ops Ready S4 Mil-spec Stock Kit

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...