Hello I recently found other issue

Guns like 9A-91, Vintorez and Val should be silenced but are not

this mean other player will still hear you and hostle mob will also hear you sooner

oh btw I play latest version mod 1.16.5 forge

This issue will remain on the to-do list for a future update since we haven't found a solution yet

This issue will have somewhat of a fix in 0.8.0. Val, Vintorez and 9A-91 (the three integrally suppressed guns) will have their suppressors become a barrel (muzzle) attachment and not be "silenced" by default.