Mike in Arizona. I've been looking at the 10 mm for a couple years now. A deal came up for a Polymer80 PF45 and so I jumped on it. This may have been a mistake. It took about 4 months to buy all the parts for the lower and that's where I am right now. I've been looking for a slide and the upper parts for a few months now. Not having much luck though. Also been looking for brass and dies without much luck. Is this the most popular firearm in the world or just the times? Hopefully I can get some parts and some ammo in the next year or so. In the mean time, I will check out the hand loads and any other info I can find on the forum.