Poor design, works good as an instant pistol buffer - JE Machine Tech AR-10/15 Mil-Spec Skeletonized A Frame Buttstock Combo

So, I received this tonight. Looked at it, and thought, looks pretty good. Feels solid, coatings were good, and pad felt decent for design. Installed the tube, locked in place, took the stop cap off of the stock to allow stopper to draw fully and slide onto the tube. Still liking my purchase, grabbed it wiggled it, very little play. I thought, pretty nice for the price. Went to extend and shoulder and thats when disbelief set in. It came right off in my hand. So, I looked down the opening of the stock and pulled the release lever. The pin dropped completely, even with the cap on. Looking at the pin, first assumption is that it’s too short. I am going to have to “fashion” something to put in place to limit the travel of the pin. I would return, but with the price of this purchase, its more of a burden to return, than it is to tinker with it to make it effective. Other than that, I actually like the fit and feel of this stock for my 9mm. It could use an 1-1/4’ slot for a sling though, but does have one QD spot in the usual.