The gunman, Devin Kelley, bought his Ruger AR-15 legally after the Air ... available accessory is the trigger crank, which allows the shooter to spin a mechanism attached to the trigger like ...

The modular design of the AR rifle is a big part of its enormous ... but the nock also activates a special safety feature in the Anti-Dry Firing mechanism (ADF) to prevent the shooter from dry ...

The gat crank doesn't involve pulling a trigger ... giving a semiautomatic rifle a fully automatic firing mechanism. "It's about four minutes of work, and it's exceptionally easy to do," says ...

One of the two images of rifles published by the station show an AR-15 type rifle with a bump ... forcing the firing mechanism to move faster than originally designed, according to the Trace ...

The device, also known as a "gat crank," can sell for as little ... converting its firing mechanism to that of an assault rifle, and therefore rendering it faster and more dangerous—but also ...

Other than those similarities, their firing mechanisms were fairly different ... produced the Bailey Machine gun in a .32 caliber rifle cartridge which was odd for the time as the Army was ...

A source familiar with the case told CNN that the possibility of modifications to the firing mechanism of the gun was learned by the special prosecutors overseeing the case in New Mexico.

In 1962, the U.S. Navy also got into the quick-firing ... using a manual crank. But weapons like the Gatling and Gardner guns had successfully proven that manually operated mechanisms worked ...