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Most triggers use a small flat or slightly curved lever (called the trigger blade) depressed by the index finger, but some weapons such as the M2 Browning machine gun or the Iron Horse TOR ("thumb-operated receiver") use a push-button-like thumb-actuated trigger design, and others like the Springfield Armory M6 Scout use a squeeze-bar trigger ...
A rail system mounted on top of a SIG SG 550 A dovetail rail on a rifle receiver for mounting a sight. A rail integration system (RIS; also called a rail accessory system (RAS), rail interface system, rail system, mount, base, gun rail, or simply a rail [1]) is a generic term for any standardized attachment system for mounting firearm accessories via bar-like straight brackets (i.e. "rails ...
A binary trigger (or pull and release trigger) is a type of device that allows a semi-automatic firearm to fire at an increased rate. A binary trigger works by firing one shot upon pulling the trigger and then firing a subsequent shot upon release of the trigger. Binary triggers are installed through modification of the fire-control group.
A hell-fire trigger is a device that allows a semi-automatic firearm to fire at an increased rate. The hell-fire clamps to the trigger guard behind the trigger and presses a "finger" against the back of the trigger to increase the force that returns the trigger to its forward position, effectively decreasing the time required for the trigger to reset, allowing for a faster follow-up shot.
This makes the "trigger crank" avoid classification as a machine gun for purposes of gun law in the United States, as stated in an IRS revenue ruling [1] and various other private-letter rulings by ATF. [2] [3] However, a battery-powered "trigger crank" (and by extension Gatling gun) is a machine gun as was determined by the ATF in 2004. [4]
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For example, on self-loading rifles such as the AR-15 and M16 rifle, the user's grip hand can manipulate the trigger and magazine release with only the index finger, while using the thumb to control the safety or selector switch, all without needing to remove the palm from the grip. A drill with a pistol grip.
Trigger guard of a SG 550 rifle. A trigger guard is a protective loop surrounding the trigger of a firearm designed to prevent unwanted contact with the trigger, which may cause an accidental discharge. [1] Other devices that use a trigger-like actuator mechanism, such as inhalers, crossbows and power tools, may also have trigger guards.