I've been searching for a 5.45 bolt for months now with no luck. When I finally found a guy who had one I let on that I haven't been able to find one which prompted him to hold on to it singe could get more money. So my question is, would it be a good idea to just buy a 5.56 BCG and get ye bolt widened to fit the 5.45 case? I've read about it being doable but didn't think it was worth it until now. I'd beget a professional to do it of course. Any thoughts?