The "Snake Charmer" manufactured by various companies over the years such as H and NEF. .410 single shot. Compact, light. inexpensive, and VERY minimalist. Good for small game, poisonous snakes (hence the name), and with slugs, could be used for deer-sized game and dangerous predators of the 4 and 2-legged variety, at close range, if that's all that you had.