Trigger crank
Gun modification for faster firing
From Wikipedia, the free encyclopedia
A trigger crank is a device that allows a semi-automatic firearm to fire at an increased rate. The trigger crank typically consists of a screw-tight clamp and crank assembly. The crank assembly positioned in front of the trigger and clamped onto the trigger guard of a semi-automatic firearm. When the crank is turned, teeth on a gear-like wheel depress the trigger and cause the weapon to fire.
Internally, the firearm is not altered; hence, only one round is fired with every stroke of the trigger. 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 "trigger crank" driven by a motor (and by extension Gatling gun) is a machine gun as was determined by the ATF in 2004.[4]
The devices have elicited scrutiny by gun control advocates and media commentators because of the perceived lax regulation placed upon them.[5][6]
