A compensator directs gas upwards, thus forcing the barrel downward upon discharge. This helps to reduce muzzle "flip", and assists in faster reacquisition of a target. It also reduces felt recoil.
Beretta 92FS with compensator - 9mm
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On a real gun it deflects the mussel gas and helps to keep the gun barrel from flipping up. It also helps in recoil reduction. In an airgun it is more for show and has little effect on the gun.
If you mean more controllable during full auto fire, the Thompson would get my vote. Slightly heavier gun, lower energy cartridge, muzzle compensator.
A compensator on a handgun is something that vents the hot gasses and pressure upward, which pushes the barrel downward. This is a way of reducing muzzle rise or muzzle "flip" which is the upward component of recoil. (The reason a handgun flips upward when you shoot it is because the recoil is generated in the barrel, and the barrel sits above the place you grab the gun.) A compensator is sometimes called a muzzle brake. The same effect can be achieved by "porting" a gun's barrel, which means to drill some small holes in the top side just a short distance back from the muzzle.
A compensator for looks only. Air soft "weapons" don't generate enough recoil for one to be needed.
The compensator is causing the action to bind, or the additional weight is preventing the slide from moving freely.
No
No
The noun would be Compensator
Earl's favorite gun, his 3rd Generation Glock 17 named "Earl Jr." is two-toned with an Insight M3 light, 33-round magazine, a compensator, and modified to fire fully automatic.
"a compensator is a piece fitted to the end of the barrel of a gun. typically its a tube with holes in the top. its purpose is to limit the upward verticle travel of the muzzle when the weapon is fired. the purpose of this is to increase the accuracy of the following shots." Some times it is fitted to reduce recoil in large cal. weapons like the Barretta M107, with such a large cal. (50 cal.) the recoil can just break your bones. This type of compensator has T ITS side vents that are tilted backwards to redirect exhaust gases backwards pulling the gun away from shooter therefore balancing forces and keeping an accurate shot and no broken bones :)