Tomba - All in One barrel sealing

[popgun pete]

Maybe you could set up a Tomba shop on Facebook as others have done. While Salvimar has a vacuum muzzle, the models from Mares, Seac Sub and Cressi don't except for the latest Saetta Pro. The STC system is not that great and Omer which used it have gone.

 

[tromic]

How is possible to load spear gun having Tomba700X kit under water if there is no x-ring or cuff shape seal, just two O-rings, one on the shaft and the other on the plastic insert that makes the loading more fluent and tolerate some bowing of the spear?
Pushing at the slider with the O-ring in front of it the water pressure pushes out the plastic insert for 1.5 mm. After beginning loading the shaft into the spear gun the vacuum sucks the plastic insert back into the muzzle.
It is very important to push the plastic insert back into the muzzle before next loading! Not doing so some more water could left in the muzzle that will prevent normal loading of the shaft. Other possible issue might be serious damage to the muzzle on shot.

 

[tromic]

How is possible to load spear gun having Tomba700X kit under water if there is no x-ring or cuff shape seal, just two O-rings, one on the shaft and the other on the plastic insert that makes the loading more fluent and tolerate some bowing of the spear?
Pushing at the slider with the O-ring in front of it the water pressure pushes out the plastic insert for 1.5 mm. After beginning loading the shaft into the spear gun the vacuum sucks the plastic insert back into the muzzle.
It is very important to push the plastic insert back into the muzzle before next loading! Not doing so some more water could left in the muzzle that will prevent normal loading of the shaft. Other possible issue might be serious damage to the muzzle on shot.

View attachment 60242

Despite of possibility to load the speargun with Tomba under water I still advice the most secure method:
Before inserting the O-ring and the slider into the Tomba muzzle you should first tipping water that sits just in front of the piston out of the front end of the gun. This is done by holding the gun momentarily above the surface to seat the slider in the muzzle entrance, then lowering the gun back into the water to complete spear loading with the hand loader. This is the safest way of loading this kind of the spear gun.