Did a little research on the SL8-1, including picking one up for a fit test.
Unlike the G36, and the SL8 that the rest of the world can buy, the SL8-1 can only fit the 10-round single stack mag. The SL8 is supposed to be able to change magwells to fit SL8 (full size), AR, or Steyr mags.
The rifle is supposed to run very clean, especially compared to an AR. No dirty gas gets back in the reciever, except what comes with the case during extraction.
The scope-and-dot sight set w/ carry handle looks pretty cool. I'm waiting to see pix of one of those on a full length rail on an AR.
I have fairly big hands. The thumbhole stock would NOT permit me to get my thumb all the way around to proper firing position. I like having the forearm bones pretty much pointing into the grip... best I could get was to have them aligned into the right side of the grip. Very uncomfortable, for me. Also, the safety lever, in the fire position, impinged on the top (thumb side) of my right hand.
I suggest hkpro.com for more info.
(let's see if I can get the link working)
[url]http://www.hkpro.com/[/url]