SS457?

[Jammin22]

I'm looking at buying a used SS457, is there anything to look out for? Was there 2 version? One being better than the other? 

I'm aware of the carbon bottle vs. Original bottle. 

 

[mercado]

The difference between first gen n second generation aside de bottle...is the valve change second gen has a more powerful one.. almost 120 fps more than the old valve with the same bulle weight..

 

[TEXAS]

Either one is more than the average shooter needs.

Devastating power inside 200yds

Edit:

Make sure you can feed it because they eat up a tank fill quickly topping off every five rounds spent