Where did you find the grey 365 module?Factory SIG grip modules are not nearly so expensive ($35?) and are colored all the way thru'.
Most of us have gotten in the habit of sanding a little here/a little there on our poly frames; simply not an issue if the color goes clear thru'.
For those troubled by only MS frames being available; just get a MS. Ya' don't have to use it, and it is useful at times.
ETA; found a gray module for the 365; really like it.