P250, P320, P320 X-5, M17, & M18 Pistols
I've done so much research and dove into this but I'm still so confused. I figured out turn to the pros.
From my understanding, I have the following:
Compact Grip Module labeled "m" for medium is my guess.
Compact Slide (measured out at 6.3 in) {Flush with grip}
Full size Threaded Barrel...