I got a few .30 cal rifles along with my scar 17 and I have been waiting for my TBAC 30P for a few months already. I would like to be able to use this suppressor on my scar but I have heard that since the scar barrel has little to none for a shoulder after the threads its not smart to just thread it on. Has anyone played with this setup? Machined maybe jam nut or just use the factory one? I have months to think about this so help me dull the pain of the wait time.