P250, P320, P320 X-5, M17, & M18 Pistols
I was looking into barrel options for the X Five, specifically threaded, and there doesn't seem to be much out there. It seems like the option is $330 for a Barsto or ≈$330 for a full length barrel and new slide.
I noticed the hood on the back of X Five barrel is narrower than a Full length...