The question is non detailed, therefore it allows for many possible answers. But in general, a 30-06 simi auto with hi rise scope, to allow for open sight close range shots. The 30-06 is not an amazing gun in any catagagory, but good on many catagories. It has many different grains of bullets available to choose from, you can down load to kill a coyote, or up load to kill a moose. It could serve in a pinch as a combat / defence weapon. 40 cal simi auto hand gun. 40 cal travels faster than 45, it has more penetration than 45 is cheeper than 45 and you get more shots in a clip. Divide by 9, a 40 cal is 8/9ths as big as a 45. A 12 guage pump, chambered in 2-3/4 3" and 3-1/2 magnum. it could be used for birds, rabbits. turkey, deer, boar, and a good close range combat gun. the possibility of a slug adds range possibilities also. A forth choice. would be the humble 22 lr simi auto. Light cheap ammo, Perfect for the smallest game, and with 21 repeating shots it could be used in defence or to down a deer in emergencies.