I bought one when they came out, its Sig branded. That was probably 12, 13 years ago?
Accurate. Can be a bit choosy with ammo when suppressed but runs well on almost anything unsuppressed. The rear sight also fell off of mine once. I put it back on.
I've shot thousands and thousands through it. It's a good deal looser than when I started and the finish is very worn. I'm not sure I would buy it at a comparable price to a mk iv (since they're within a 100 bucks or so of each other now) but it certainly isn't a bad gun, just a cheap pot metal one.
If you enjoy shooting 1911s, it was one of the earlier reliable ways to get 1911 action with a 22. I never found most conversion kits to work well.
Disassembly is a little weird. There are several small screws and a couple of weird little spacers if I recall.
I'll cerakote or moly resin mine one day. I can safely say I've gotten my money's worth out of it.
The trigger is better than I expected although I'm not going to tell you it will blow your mind or anything. Just better than most other cheap 22s it competes with.
It seems quieter than most other 22s when suppressed. Not by a lot since they're all pretty quiet, but quieter than most. I think the p99 is a little quieter though.