An HK94 in good shape with an A3 stock in good shape will have almost no vertical wobble when the stock is locked in the extended position.Ok, I got it on, the receiver is clone, and the stock is clone, so there must be some spec issues. I gave the butt cap a couple whacks with 2x4, it went on (but I'm sure it'll be tight if I want it off.)
The end result is pretty good, very tight when closed, and slight up/down wobble when open. Is the HK94 stock tight when fully open with no wobbles? Now I know why people prefer the full stock, there's no cheekweld on the metal stock. A3 stock looks cool and saves space, but not as functional in terms of usage.
For those who are viewing AviatorDave's comments with a wrinkled brow...
Dave has been through the HKPRO MP5 class (so have I!). This class is taught by the head HK addict around here and is a super condensed version of the old HK ITD course. Let's face it, it's tough to cram an entire week into just one day, but Pro pulls it off as long as nobody passes out. In this class you are taught the correct way to shoulder the MP5. This method usually comes as shock and major pain to those who have been shooting rifles and shotguns all their lives. It's even more difficult for folks with military experience with FA rifles.
The concept of a subgun is for instant reaction at CQB range. There is simply not enough time for a slow, cheek-welded, precision aimed shot. By placing the butt of the stock in a position as describe in the previous post, one retains the ability to be aware of the surroundings and very quickly bring the weapon on target with amazing speed. It's a swing up, front sight, fire thing. Staying square, keeping your elbows down, and using the stock plant pivot is amazingly effective. And yes, it's uncomfortable to learn and deploy.
The retractable stock does not have any bearing at all on this technique because cheek weld isn't part of it. If you haven't been to an HKPRO MP5 class... what are you waiting for? Just don't show up with an Uzi. First, it's bad form, second, it will break. :100000: