Yea, I know. A small part of me dies everyday I don't get to shoot one. They just seem soo fun to shoot. I handled a long bbl one once. If I would have had the cash I would have got it.
I have a KRISS and like it alot. My criticism of it are as follows:
1) The muzzle rise reduction is mainly for the full auto SMG version. The semiauto version makes it less needed.
2) The recoil reduction is nice but recoil from a .45acp round isn't much anyway so I can make a strong argument against the price.
3) The weight is significant such that I could use the same 30 round magazine in a Glock 21 and be more portable.
4) To use the suppressor you have to shorten the barrel to 5.5" and SBR it. You also lose accuracy and range.
5) At 100yds the 45acp bullet drops 5-6" so it is mainly a close quarters gun anyway.
I picked mine up right when they came out before many other carbines were available. Now KelTech has 9mm and 40S&W carbines for a whole lot cheaper, Glock has conversions to switch your pistol into a carbine, and there are a few other companies out there that make pistol caliber carbines for 1/3 to 1/4th the cost of the KRISS. When I got mine the KRISS whas 1/2 the cost of its only competiter the H&K UMP unless you got a Tommy Gun. ;-)
I had a conversation with a KRISS representative and told him my thoughts. My suggestions to him were to release it in different calibers like 10mm, 44Magnum, 50AE, 50S&W, or even 50BMG! How about a Shotgun version?
Again, I do like mine and bought it thinking it would be better for home defense than my rifles. At least for my innocent neighbors.