OK, I have a JAC .22 kit for the AR. The plate in the back is meant to butt up against the buffer tube in an AR. In the SCR, the plate can not clear the stock, as it slopes inward to accept the recoil link on the BCG. If I remove metal from the bottom/bevel the plate as shown by the blue line, it will fit and it will work. However, I am concerned that this could be unsafe - if I don't do it exactly right there COULD be some up/down wiggle MAYBE. Since the .22 is not gas operated and does not recoil against the buffer (it has it's own recoil spring and the BCG rides on the two rails shown, which are not attached in the affected area, asking for opinions if this can be done safely. Don't really care if the kit is ruined, have only used it twice in 20 years, but the SCR appears to be really really ready to be a .22!