MEU mag fill-in oring

[Conker]

I've got 3 Wilson Combat type (MEU) mags, and with the 3, the "outside oring" of the fill-in valve bursted out during a gaz refill. Two of these mags did that while being brand new, for their first refill.

So two questions:
-Can I find orings of that size at a "standard" hardware store (or any other without buying new valves or mags)?

-Is there anything I can do to ensure it does not happen again?

I'm using propane with the metal Madbull XG02 adapter (with integrated silicon oil reservoir).

Thanks!

[Conker]

Originally Posted by Conker

-Can I find orings of that size at a "standard" hardware store (or any other without buying new valves or mags)?

So, as some PM'ed me about it, I bought refillable lighters to use their o'rings. Indeed, they are the same size. Problem solved!

Originally Posted by Conker

-Is there anything I can do to ensure it does not happen again?

After more than 4 or 5 orings blown out (my first replacement ones vanished at the first refill, too), I'm still looking for a way to ensure that they stay in place. Any idea?