The rules can be downloaded from the IBU website, for which there is a link on the Link Page. The action of the rifle must be manual. The most commonly seen high-end rifle on the biathlon circuit. They tend to be very reliable and be very well manufactured. The price tends to be higher than others because of this and brand-name recognition.
Triggers are adjustable two-stage.
You have to buy an adaptor kit and outfit it yourself. No snow covers on the rifle either. Has a two-stage trigger. An excellent entry biathlon rifle. Comes with 5 magazines, magazine holder, hand stop, harness rail and snow cover on barrel.