By the way, I am happy to carry a round in the chamber if you would like to back up any accidental discharge by paying me a monitary sum for any such incident
Not intending to "dis" your mode of carry but, why would you be concerned about ADs with a Sigma?
The Sigma (and the Glock from which they are copied) are, by way of design, one of the LEAST likely to have an AD....unless the user "accidently" pulls the trigger, it would in fact, be near impossible to have an AD otherwise.
In these designs, a chambered round is no more likely to AD than one in the mag.
Again, not a "dis"...just curious.....