I might be secure enough for most stocks, but the PRS is a friggin' beast heft-wise! When the recoil kicks it back, it just wants to pop that thing out. What made it come out a few mm for me, was probably when I dumped a mag off the hip at the end of my shooting session. As I mentioned, I really tightened the hell out of everything and did use LocTite. Doesn't seem to be enough, at least not for off the hip shooting. Well, there is one way I could get in on tighter... The way that the MD Arms Molot grip is designed, the screw head starts going right through the plastic base on the bottom if you screw it in too tight. I've ruined the plastic base on one of them before, by tightening the screw until it went all the way through the plastic! LOL. Mike was nice enough to send me another base. I am thinking that, in this case, if I used some kind of a spacer/washer, to more evenly distribute the pressure on that plastic base, I could get the grip screw tighter, without going through the base.
Yeah, the top screw alone is definitely not enough, especially considering how it goes through that free-floating washer, instead of a tapped hole. The JB Weld solution is a bit too messy and permanent for my tastes. I would rather just drill a couple of holes on the side of the receiver here. I think that's what I am going to do here, once my buddy with a drill press gets back in town.
By the way, I considered a folding mechanism, but decided against it. It adds another point of failure for the PRS' heft to work its "magic" on, while it swings on there. Plus, I plan on always keeping something attached to the optics side mount, preventing the stock from folding all the way. I actually just went ahead and ordered this part:
You know, I am having regrets about cutting that tang. I kind of wish I just kept that Choate drag stock on there. Without the tang, I also lost the option of using a Beryl mount in the future.
As far as external blocks, I have one built into my K-Var triangle folder that's on my SGL21. That stock actually ends up being the perfect length for me and offers good ergonomics and cheek-weld. The only problem I have with it is the "looks". The external block definitely made the PRS sit too far back though, but then again, it could only be because my PRS is the AR10 version, with the cheek rest sitting further back...
I used this block and have put about 900 rounds down range with it. I did sink a screw through the block to the buffer tube to make sure it didnt twist or move.