Thanks Lone Star,
I've been purchasing guns and stashing them away for the last 30 years for when I would finally have the time to play with them. Most are still NIB, and now I get to see how they perform.
I managed to collect two XPs and probably should have seen the future in things that they would eventually be discontinued.
So I'm running thru all the possibilities, and locating shops that do these conversions, and will convert at least one of them to either a rear-grip pistol or a rifle configuration in 6mm.
I have a good use for the 223 just as it is, but depending on muzzle blast, this one may serve better converted back to the original XP caliber, 221 Fireball.