A modular speargun for underwater hunting is disclosed. The system contains a plurality of components which allow for customization of the speargun based on the user's needs and the conditions where a user is hunting. By allowing rapid additions or removals of certain components, the invention allow the user to easily modify the firing characteristics of the speargun, and thus target a wider range of prey across a wider range of environmental conditions than those designs currently available in the prior art.

An arrow gun is provided having a controllable retention force on the arrow. By setting the retention force on the arrow, increased energy from motive compressed gas can be imparted to the arrow. The arrow gun also includes a damping coupling for reducing vibration of an unsupported length of the barrel.

An arrow gun is provided having a controllable retention force on the arrow. By setting the retention force on the arrow, increased energy from motive compressed gas can be imparted to the arrow. The arrow gun also includes a damping coupling for reducing vibration of an unsupported length of the barrel.

An arrow gun is provided having a controllable retention force on the arrow. By setting the retention force on the arrow, increased energy from motive compressed gas can be imparted to the arrow. The arrow gun also includes a damping coupling for reducing vibration of an unsupported length of the barrel.

An arrow gun is provided having a controllable retention force on the arrow. By setting the retention force on the arrow, increased energy from motive compressed gas can be imparted to the arrow. The arrow gun also includes a damping coupling for reducing vibration of an unsupported length of the barrel.

An arrow gun is provided having a controllable retention force on the arrow. By setting the retention force on the arrow, increased energy from motive compressed gas can be imparted to the arrow. The arrow gun also includes a damping coupling for reducing vibration of an unsupported length of the barrel.

An arrow gun is provided having a controllable retention force on the arrow. By setting the retention force on the arrow, increased energy from motive compressed gas can be imparted to the arrow. The arrow gun also includes a damping coupling for reducing vibration of an unsupported length of the barrel.

The invention refers to a new ejection order of spears or arrows which functions with compressed air and can be applied to spearguns and crossbows as well.

Two piston ejection device which consists of two air chambers (A) and (B). These air chambers are connected so that they can exchange gases. Air chamber's (B) external hole is open. The characteristic is that pistons (1) and (2) move in air chambers (A) and (B). Pistons (1) and (2) are also connected with the rope (3).

The invention refers to a new ejection order of spears or arrows which functions with compressed air and can be applied to spearguns and crossbows as well.

Two piston ejection device which consists of two air chambers (A) and (B). These air chambers are connected so that they can exchange gases. Air chamber's (B) external hole is open. The characteristic is that pistons (1) and (2) move in air chambers (A) and (B). Pistons (1) and (2) are also connected with the rope (3).

An arrow gun is provided having a controllable retention force on the arrow. By setting the retention force on the arrow, increased energy from motive compressed gas can be imparted to the arrow. The arrow gun also includes a damping coupling for reducing vibration of an unsupported length of the barrel.