For those unfamiliar with the HERA ARMS TRIARII you can watch these videos:
Assuming that the company does not certify the TRIARII for use with silencers now we analyze the reasons (for the Glock model):
1 – Length
The length of 15,6 cm / 6,14 inch from the muzzle of the Glock to the muzzle of the TRIARII is the major problem …
Another problem is the cocking handle of TRIARII (unlike the CAA RONI) is on the front of the Slide making it impossible to screw a silencer.
It would be possible to mount only having a longer barrel of at least 5 cm / 2 inch than normal but, in any case, it will go back to the problem described in point 1
No you can not use it with a silencer (perhaps it is by installing a custom +- 12 inch barrel)