A reel for fishing line or the like provides for extremely rapid payout by releasing the line to unwind by sliding rapidly around a guide surrounding the line spool and by rotation of the line spool itself. A lever controls a line guide preventing sliding of the fishing line around the guide and providing controllable friction and locking of rotation of the line spool only when actuated by the user to permit retraction of the line or controlled tensioning of the line.

A reel for fishing line or the like provides for extremely rapid payout by releasing the line to unwind by sliding rapidly around a guide surrounding the line spool and by rotation of the line spool itself. A lever controls a line guide preventing sliding of the fishing line around the guide and providing controllable friction and locking of rotation of the line spool only when actuated by the user to permit retraction of the line or controlled tensioning of the line.

A system for underwater hunting 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.