Rev9 & 45, ALL configurations below – 5 TO 7 ROUNDS then allow to cool to ambient temperature. - These ratings are intended for sporting (hunting) use only.
Important to point this out. It’s cool that they made it possible for the suppressor to do this for a limited round count, but unless you’re really strapped for cash, a different multi-cal suppressor (Griffin’s own Optimus) is probably a better idea.
That’s not the upgrade the OP is talking about. The one you linked only upgrades the piston & booster housing to allow spanner wrench slots for disassembly.
The Mod 3 is rated for some super sonic rifle calibers whereas the Mod 1 and 2 are not. It appears the tubes are different so a Mod 1/2 upgrade is highly unlikely.