Rolf: I dislike the R93/R8 myself.. even though it has alot of good sides as well.

If I where to build one of these rifles, I would search for a M98 action. Prefrebly in 9,3x62 or x57. There should be hundres of good rifles in Germany. Search egun.de

A 18" barrel and a good suppressor. Dont risk your hearing or people near you! Keep the factory trigger and original safety.

http://www.bjorkenor.com/M98/M982.jpg

http://www.bjorkenor.com/M98/M981.jpg

That is a orange Hogue stock.. just so one can find it again if you drop it