Get a stormwerkz type 3 or 4 -- inline 3 is better for recoil management, 4 factory angle if you have a fat face.
You want that vertical adjustment. My only gripes are two fold -- 1, the ACE BOSS does help to prevent rotation, which this lacks; and 2, the VZ adapters do not have a QD mount integral like their M92 PAP ones do that I have on a different gun...
I *think* the threaded portion towards the top might be made to fit a standard swivel, but don't know for certain. Check w/ SW.
The SW adapter plus either the ACE or SW folding mechanism. SW locks when open, as well as when closed, and the lockup when closed is tighter and stronger with integral and increased wear tolerances. But since the Boss feature is lacking on SW, your AR tube adapter will likely rotate before folding mechanism itself its ruined. Locktite on face of stock adapter on assembly will help to prevent rotation in addition to properly tightening screws.
This is the adapter you'll want to use if running an AR stock w/ SW folder w/o the boss:
https://www.primaryarms.com/doublestar-corp-pig-nose-adapter-for-ar-type-stocks-no-boss Many other stocks also use this screw hole pattern.
Be aware that depending on thickness of stock, SW folder may not lock open.
The reason for stacking is that it allows you to mimic the Rifle Dynamics slightly cantilevered stock setup that helps to control and minimize recoil to the extent your face profile and optic/sight selection allows. Each level of stacking allows you to move the stock higher. All of the one piece AR adapters/integral folder adapters are lacking in this functionality. And it's very unlikely you'll torque your stock enough to cause it to rotate, and offsetting screws on hinge to first level adapter stops the issue there.. I just rotated it slightly while torquing down (probably over-torquing) castle nut before locktite had cured so wanted to note the possibility.
Very happy w/ this setup on my M92 truck gun -- though thinking about moving it out of the truck given their doubling in price vs a few years ago, and the potentially forthcoming brace ban...
Rifle dynamics mount, if you're unfamiliar:
https://www.youtube.com/watch?v=jCS7myq56W4