I have a GAP 308 with a 26" Mike Rock contoured barrel and was wondering if it can be shortened? I love the rifle and it is a tack driver but 26" is so long for a 308 imho and not that i got my tax stamp back for my AAC Cyclone it would be even longer with it on, lol. So the question is can a contoured barrel be shortened and threaded or would i have to re-barrel? Thansk.