This is intially dealing with suppressor usage in the CF (conventional forces)
The only rifle currently suppressed are CF sniper weapons, the MacMillan Tac-50, PGWDTI Timberwolf, Armalite AR10-T and Diemaco(Colt Canada - a division of General Dynamics) C7CT.
However members of sniper dets have affixed suppressors to the C8SFW/C8FTHB (the can from the C7CT). (3 R22eR also attached the CT can to a C8A1 for a video but it cannot be fired that way due to the barrel diamater not being compatible with the suppressor attachment point.)
Now pics
TAC-50
TimberWolf
like the Leaf...
AR10 -- edit no pic - the only pic I have is this is from a unit that is publicity shy...
C7CT
Other misc suppressed pics
SA80A2/IW
Midlength 6.8 SPC
MRS concept gun ( the MRS which came the unfortunate C7CT boat anchor)
C8SFW with C7CT suppressor
CF PDW candidate
Current technology suppressors effectively remove muzzle blast from the equation and add a aprox 25 fps to the muzzle velocity. Thus the weapon is not anymore ineffective (many seem to think there is a velocity loss with a suppressor - as was true with the old submachien gun suppressors from the 70's that added port to bleed pressure and rubber wipes to futher trap expanding gasses)
with the suppressor than without -- and the 10" C8CWB with OPSINC suppressor used elswhere in the CF is actually a tad more effective with the can.
Since the expanding muzzle gasses are retarded and do not suffer explosive combustion at the muzzle there is no thump (from crack thump) thus both flash and report sound is minimized - true their is still super sonic bullet flight noise - but it is next to impossible to determine the direction of fire (no thump) when the second report (the sonic wave "thump" from the muzzle gasses allow proper oreintation to locate the shooter) is missing.
Furthemore since the muzzle gasses do not explosively expand recoil is reduced to a larger degree.