I recently put one on my A-5 and after one day of shooting the pin joints busted off the stock. I ordered another one off amazon and figuring my original one was a bunk stock and I recieved it today... I put it on, fired maybe 20 shots before the joints blew again!!! I even had my air turned down really low.
This thing looks good but its a waste of money. 1 star

First people should understand what exactly you can use this for. This stock WILL NOT work like that on a real rifle. Your mask will prevent you from resting your cheek on the stock and aiming down the iron sights.
But there are other great ways to fix this problem.
There are sight offsets which will allow you to attach a sight a couple inches to the left (or right) of your primary rail. This will allow you to utilize both the stock and the sight but of course this will require you to buy a set of sight offsets first.
The next is a bit cheaper alternative. Simply use the stock to support your marker and use a "point and shoot" method like that on a shotgun. Most players use this method anyway so it shouldnt be a problem.

The stock itself does its job well. It provides great support and stability while aiming and firing your marker. It can fit a variety of figures since it is collapsible. At a full setting I can use it and at its smallest setting my little sister (almost 1 foot shorter) can use it properly, so the question "will it fit me?" does not apply here! For a paintball stock its price is reasonable.

If you want to add stability while aiming or shooting or just want to give that mil-sim look to your A-5 then I recommend this stock. 5 stars

I got the a-5 with flatline barrel, and this stock. It gives it a great feel and increased control. Make sure you get a coiled remote though because the tank will be in the way (and also unbalance the marker). For anyone new to paintball, don't use this for speedball (I wouldn't anyway) as you would have much better luck with a smaller auto-cocker. If your into scenario games and having a distinct advantage over the other team with better accuracy (especially with the flatline) then you'll love this. 5 stars

i have been playing paintball for 7 years now and i puchesed this stock and although it dose provide grate suport it dose not allow you to look down the sights with your mask on and thins it a big problem when you are trying to snipe but if you are good at winging it and not useing a sight then go for it if not hold back and use your tank 2 stars

This collapsible stock is an excellent product when considering the quality and appearance. However, using the M4 stock on a paintball gun modeled after an H&K MP5 sub-machinegun does not work as the stock is too high for comfortable alignment of your eyes to the sights. If you can raise the line of sight with a red dot electronic sight or something of that nature then this accessory would be just fine. This stock does clear a 20 ounce tank. 4 stars