Rolf, the carving is basically from an Ohio National Road rifle by James Clark. Muzzle blasts and the KRA both featured this rifle a few years ago. On the Clark rifle the behind the cheek piece is done in silver inlay and I basically did it in raised carving. The butt plate, highly modified, is also taken from this rifle. Lots of stuff is taken from Fleeger, one of my favorites, but this rifle is BIG for a Fleeger because it's .50 cal.
Shrechmeister, Silver-brass inlay is actually easy.