Compensator

Compensator can refer to:

Pressure control on a piston pump
A muzzle brake, used to counter the recoil of a firearm, or to prevent the muzzle from climbing and kickback from accouring the during rapid fireing of an automatic weapon or semi automatic weapon
A device that offsets or counterbalances a destabilising factor: See
Motion compensator
Optical compensator also known as a Retarder; examples include a Half-wave plate and a Quarter-wave plate

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