open co2 regulator gauge?

So my tank and gauges fell off the keezer hump and dented the floor. Upon inspection the gauge that reads the pressure in the tank the inside shifted and kind of dented. I unhooked it but can't seem to open it up. Any suggestions? Or just grab a new gauge for $8-11 bucks.

 

Not really accurate anyway, but no once there bent they're pretty much toast

 

Alright that's kind of what i thought. Thanks beaksnbeer!

 

Just order up the correct replacement for it. Depending on the regulator you have, I'd also look at getting a guage cage for it. I have one on both of my Taprite regulators and it's saved them from damage already.