Underwater hunting gun of the crossbow type with effortless string-drawing device and low recoil

An underwater shotgun of the crossbow type, that includes:

• a butt (1) with a mechanism for locking the rear end of an arrow (3) and a device for releasing the said arrow (3),
• a longitudinal arrow support element (2),
• elastic propulsion means with at least two lateral elastic cords (8), one end of which is designed to be hooked into at least one notch (17) in the rear part of the arrow (3), and
• a device for stretching the lateral elastic cords (8) including:
• a cocking base (18) fixed onto the longitudinal arrow support element (2) and with fixing elements (18-1, 18-2) intended to receive the first ends of the lateral elastic cords (8);
• and
• a mobile head part (11) with thrust arms (15) positioned laterally on the mobile head part (11), the mobile head part (11) being designed to slide along the length of the arrow support element (2) under the action of a system for moving the mobile head part (11) between:
• a rear position (A1) which, after passing around the thrust arms (15), allows the second ends of the elastic cords (8) fixed at the cocking base (18) to be placed without tension in the notch of the arrow (3), and
• a forward position (A2) in which, when they are hooked into the notch (17) of the arrow (3), the elastic cords (8) are stretched to the maximum by a stretching movement effected, during the movement of the mobile head part (11), at an intermediate part of the elastic cords (8) passing around the thrust arms (15).