Vacuum muzzle for Vuoto inner barrel ø 13, shaft ø 7mm

The vacuum muzzle makes more power of standard pneumatic spearguns with inner barrel diameter of 13 mm. The muzzle let the water not come into the barrel. So the spear shoots out without the additional water resistance.
With the muzzle can be used the spears with a diameter 7 mm and 8 mm.
Vacuum cuff can be changed easily. It is enough to unscrew the front part of the muzzle without deflate.
Weight of the muzzle: 48 g.
Part of delivery: muzzle, consist of two parts - the vacuum cuff and damper for a 7 mm shafts. If you would like also to use 8 mm shafts, then you need the damper for 8 mm shafts.