AOSC Forum Archive

Some people see me use madbull grenades sometimes.  Well, I made the newb mistake of filling (actually, OVER filling) my grenades with CO2 the day before an airsoft game.  I got plenty of power in 3 of my shells, but I blew out key O-Rings on all of them, too.  I would assume that they froze or that they finally got tired of me over-charging them. 

In any event, I was checking out ASGI, as they sell a bunch of O-rings, but they DO NOT sell the O-Ring which broke on my grenades. 

I would assume that an O-Ring is a common enough part that hardware or similar stores would carry them, but I don't know how to measure the O-Ring.  I would assume that you need the diameter, but how do they measure the thickness of the O-Rings? 

Take the broken O-Ring with you and go to a hardware store. They'll be able to match it up.

Otherwise, measure the diameter and estimate the thickness by sight.

What Slate said. I've yet to see a hardware store that didn't have a bin of O-rings somewhere.

Ditto.

Oh, since we're on the subject of O-rings, #14s are the O-rings that will fit on a standard piston head. I know you didn't ask that, but it would have been the next question in this thread .

Don't forget to stretch the o-ring around the cylinder for 24 hours before installing it on the piston head though!