The term 'Biathlon Gear' refers to the equipment used in the sport of biathlon, which combines cross-country skiing and RIFLE shooting. The crossword solutions for this term are SKI (3 letters), SKIS (4 letters), RIFLE (5 letters), and AMMO (4 letters). Skiing is an essential part of biathlon, so skis and SKI poles are necessary gear. Additionally, biathletes must use a RIFLE to shoot at targets while skiing, and they must also have ammunition for the RIFLE.