Front rail design seems a little cluttered, and I prefer adjustable stocks. The stock still kicks ass! I don't know what to do with the front rail design, but pimp my gun has some weird options. Much better than your first design!
Oh, now that's just damn sexy! I love the SL8 buttstock, but I'm a bit iffy on those front rails, but I think this is the best variation of the Kriss platform that I've ever seen. Hurry up and get hired by TDI! I want to see this gun in service someday!