Don't forget the harness with which to carry the rifle while skiing. They may be available on the used market from those connected to biathlon. To buy a new one is close to $300.00, so they aren't inexpensive. On the other hand, almost 50 years ago when biathlon was relatively unknown in Canada, except perhaps among ski clubs with a strong Scandinavian membership, I remember biathletes fashioning a jury-rigged harness with hunting rifle slings or even ropes.
Another part of the gear of course are the aperture sights, without which a biathlete cannot compete. There are some rifles, such as the Savage shown earlier in this thread, that can be purchased with sights but do not come with a front sight snow cover.
Repeating rifles are more desirable in biathlon than single shot firearms, although it is not unheard of new-to-the-sport shooters using single shots successfully while learning the sport.
