Feinwerkbau Modell-90.
This model has a battery-powered electronic trigger. The battery is housed in the grip.
Feinwerkbau Modell-90 - Cased.
With thanks to Mike for these pics:
With thanks to Ken for these pics.
Feinwerkbau Modell-90K ('kurz' or short-barrelled)
This is one of only two examples of a short-barrelled FWB90 that I've seen.
Model mentioned here:
Feinwerkbau Modell-90 with 'scope rails cut
Feinwerkbau Modell-90K