Feinwerkbau Modell-300S Match.
With thanks to Mike H for the first two pics. Note the rake of the fore end, among other features of the stock is different to the rifle below.
Earlier model with supportive flared pistol grip cap - later banned under ISSF rules (source: Matt), and shallow curve at the top of the pistol grip.
Later model with sharper curve at the top of the pistol grip/comb front edge, less angular cheek pad, and parallel-sided pistol grip cap.