Hahaha, I was just suggesting to get data for ya and test the stuff out, personally, I've not got any real coding experience. Sorry for the confusing information.
With the FN2000, couldn't you just take the other weapons that use a grenade mode as a scaffold? Kinda like make another copy of the Tunder and make it use 5.56 SS109 and use the same grenades as the Tunder.
As for the SVD MKII, it does seem to resemble the Drag, but its stats don't. The Drag is much more accurate and the recoil isn't supposed to be so ungodly.