[AlexF]

I don't have a camera here with me at the office, but I do have the box for the regulator. The regulator seems to be a UNIWELD RHP 500 Nitrogen Regulator inlet connection CGA 580, outlet connectio 1/4: Flare M and Delivery 20 - 500 PSI. You have to buy a hose to connect to a scuba tank and another hose to the speargun. A small adaptor must be made to go into the back of the gun.

I have no clue where you can have that piece made. Here in Mexico we are in the industrial gas industry and we have a regulator factory, so it was simple for me to get, I just took the thread and gave it to them and a day latter it was ready.

Answering how long my shots were with the omer, I would guess 3 or 4 meters and I was only using one band and the thin 7mm shaft.