Revolutionary Roller-Locks uses an ACR stock.
It makes sense to use the ACR stock. It folds, has LOP adjustment and two-position cheek rest. All you need to do is figure out the mating hinge and adapter for the gun you want to mount it on.
Dan Haga has a number of designs for the ACR stock. He makes an adapter that replaces the buttpad/stock portion of the ACR stock and allows you to mount a Tailhook brace on the end.

Photo by Dan Haga
Dan Haga even designed one for use with a Strongarm brace.