I looked at the Vaperkings site and those are genuine Silver Bullets. Guess it doesn't matter since you got one cheaper from ecig.I do not think those are originals. I am looking for the one that Alt Smoke used to sell.
Back when they were still being made and sold by Altsmoke I think the M model you got used to cost $115, the basic model that Vaperkings has in stock cost $80. I have some of the $80 ones.
The difference is that the M has no wires connecting the button into the circuit. That makes it a "true" mech from a purist point of view.
I had no idea they were still available. I just ordered an M from ecig. Never thought I would have one of those.