AWC Systech..
The Turbodyne (misspelled, but who cares) is one of the absolute BEST 50bmg cans out there.
When we were shooting the M82A1's out of windows in Iraq we used the Turbodyne suppressor. The shooter didn't 'have' to wear ears, but you still would want too. The spotter would need to wear them (the cuncussion alone from that round is enought to kill your ear drums... its not really the noise).
The suppressor not only lowers the report to a comfortable (as can be) level when completely outside, it also greatly lowered the felt recoil. The factory break on the M82 makes the weapon feel exactly like a 12ga with '3.5" 00 Buck'. With the suppressor it feals like a 12ga bird shot. Its very expensive, but a WONDERFUL, WONDERFUL suppressor!
Due to the laws of physics, a suppressor is the worlds best and most effective muzzle break and flash hider. The fact that they diminish sound is an added plus.
An MP5K-PDW on full auto will 'pinch' just a hair when shot unsuppressed, but you screw on a silencer to the front, and the thing just vibrates against your shoulder or in your hands.
The M14 (7.62x51 aka 308) will raise up on you on full auto, but with a can, its a lot eaiser to control.