Yes, the plastic Ruger stock has channels in it in a diamond pattern. I situated the ARCA so it would put a bolt and lock nut in two different diamonds and then after tightening the bolts I filled those two diamonds with JB weld, but not enough to interfere with the free float. Since the nuts are held securely inside each diamond by the JB Weld, I can tighten the bolts without having to remove the barrel and action from the stock. A better option, certainly a better looking one would be to go with an aluminum chassis which would allow more options with something like an M-Lok rail on the chassis.
It doesn't look as nice as perhaps some would like with the ARCA plate attached to the forearm of my Ruger, but it functions fine and helps me kill coyotes while being a light weight and cheap fix.