If it was just a bumper, 1/8" would work.
With a swing out welded into it, im not sure?
Seems kinda thin to hold the weight of a swing out to me.
My 3/16s" 2x4 bumper will deflect slightly from the force
Of my swing out. 1/8th" might fatigue or crack. Jmho.
I guess if you had a small light weight spare, it might b fine.
I doubt air tanks are much thicker than 1/8th inch.
125 psi would probably be ok if your welds are real good.
one bad weld, and u got a fairly powerful bang!
I still vote co2! It is fast, light, powerful, portable.
Its just stupid easy imho.
2005 rubicon sahara lj #592