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A spring-gun, booby trap gun etc. is a gun, often a shotgun, rigged to fire when a string or other triggering device is tripped by contact of sufficient force to "spring" the trigger so that anyone stumbling over or treading on it would discharge the gun. Setting or maintaining a spring-gun is illegal in many places.
Gas-powered airsoft guns use the pneumatic potential energy stored within compressed gas to drive the shooting mechanism, and thus operate according to an entirely different design principle to spring- or electrically powered airsoft guns. The most common type seen is the gas blowback (GBB) guns.
Spring-piston guns, especially the high-powered "magnum" guns, are able to achieve muzzle velocities exceeding the speed of sound. The effort required for the cocking stroke is proportional to the designed power of the gun, with higher muzzle velocities requiring a stiffer spring and hence a greater cocking effort.
The ballistics of spring- or electrically powered airsoft guns differ from real firearms in that a longer barrel will not always result in better accuracy. [citation needed] The "sweet spot" for barrel length in a spring/electric powered airsoft gun is around 450 mm (18 in), beyond which added barrel length will not improve accuracy.
The BSA Scorpion Air Pistol was an air pistol made by the Birmingham Small Arms Company and first produced in 1973. [1] It was a large, heavy, spring powered, single-shot weapon available in .177 (4.5 mm) and .22 (5.5 mm) calibers and was BSA's first air pistol.
The BSA Meteor is a series of break barrel spring powered rifle first made in Birmingham, UK, in 1959 by The Birmingham Small Arms Company and the first BSA air rifle engineered to fit a telescopic sight. [1] It is one of the worlds best selling air weapons with over 2 million sold worldwide.
The pellet speed of spring-powered and automatic electric guns is determined in large part by the tension of the gun's main spring. Muzzle velocity limits are between 90 and 120 m/s (300 and 390 ft/s) for AEGs and 120 to 170 m/s (390–560 ft/s) for single-shot spring sniper rifles .
1) gas port, 2) piston head, 3) rod, 4) bolt, 5) bolt carrier, 6) spring Gas-operation is a system of operation used to provide energy to operate locked breech , autoloading firearms . In gas-operation, a portion of high-pressure gas from the cartridge being fired is used to power a mechanism to dispose of the spent case and insert a new ...