Stocky's lists this as a varmint barrel channel. Probably more like a Safari magnum barrel channel, given the dual crossbolts.
The Remington Model 798 Safari Grade It is a true, long-action, all-steel Model 98 Mauser stocked in laminated wood that looks like high-grade walnut.
Looks like an S&K Ultra-Walnut.
798 Safari grade pic I ordered one......a little channel gap doesn't bother much, and not too impressed with the Zastava stock.