Current Firmware rev for 3100R or 2400R

Hi All,

Does anyone happen to know what the current firmware revision is on either the 3100R or 2400R?

I need to get a device running v6.1 Build 5605, and not Build 5610.

I know for sure the 3100X has the correct firmware, but I don't have one in my possession, and I can't seem to find anything other than the 3100R on Amazon.

Thanks,
Matt