Does any one have the SOCOM M4 carbine stock on their XCR with a folding/collapsing adapter? I am looking for a collapsing stock that does not interfere with the mag release when folded. Keep in mind there are two versions of the SOCOM stock. One adjusts from 9.5" to 11.5" long and the other from 7.5" to 9.5". I would like to know specifically about the later one.