If that was a factory unit that hadn't been apart, it was surprisingly clean on the mechanics (although there was alot of crap trapped in the piston seal channel).

That being said, I took about half an hour today when I was waiting for the barbecue to do its thing with dinner and decided to sight it in with the open sights. Either this thing doesn't like JSB exacts, or it's sights are quite finicky. I'm thinking a little bit of both- so I will finalize it later and see what happens...