I was wanting a nice Folding stock for my M4, so I went with this. I decided to get this over the Skeleton Style folding stock since this can retract, also. I believe I made the right choice. So far, this stock has been great for me, though I have had some problems.
First problem was installation. I had to cut a LARGE chunk of my buffer tube off. That wasn't a problem. The problem was that I had to also sand down the base of the buffer tube to actually fit the stock on. This took over and hour of work since I didn't have the proper tools to do so.
Second Problem was the attachment screw. The head of this screw stripped way too easily. It is actually stripped right now, so I'm glad that the gun worked after I put it back together since I cannot remove my stock.
Third Problem was the wobbling. Folded or unfolded, this stock is VERY wobbly. This problem is mainly because of the mechanism used for folding. It doesn't hold it 100% tight. Not too big of a problem, just a little annoying at times.
So, even though it has those problems, this stock is well worth the money.
Made completely of Metal
Must cut and sometimes sand buffer tube to install
Installation Screw is kind of weak