Spontaneous Discharge of a Firearm in an MR Imaging Environment

Spontaneous Discharge of a Firearm in an MR Imaging Environment -- Beitia et al. 178 (5): 1092 -- American Journal of Roentgenology * (see NOTE at the end of this post)

Magnetic Resonance (MR) involves entering a chamber (narrow, long, tubular) which is surrounded by a powerful magnetic field.

Here's a hint: do NOT bring a handgun into the MR chamber when the power is turned on. Especially when the gun is in "Condition 1". ("Cocked & Locked")

Case in point: an LEO brings his Series 80 1911 with him when he shows up for a MR session. As he tries to set the pistol on a nearby shelf, the powerful magnetic field grabs the gun out of his hand and SLAPS it against the inner surface of the chamber.

According to this evaluation, the magnetic field 'tripped' the firing-pin interlock (typical of the Series 80). It also causes the firing pin to slam into the primer, causing an Accidental Detonation.

The thumb safety was engaged, locking both the trigger and the slide.

When the pistol was recovered, there was an empty case in the chamber ... evidence that the thumb safety was, indeed, engaged ... thereby locking both the hammer and the slide.

* NOTE Interpretation: Instant Ka-BOOM!