Discussion in 'General Gun Discussions' started by JCF, Dec 12, 2006.
Note to self: the MRI is NOT a fridge magnet.
favorite line, talking about the thumb safety:"...it also locks the slide in place, preventing retrograde motion of the slide and automatic ejection of the empty cartridge."
Retrograde... yeah that's a correct usage; I just never thought to apply it to the cycling of the slide.
Very interesting; great find.
I'm betting that the firing pin was also greatly accelerated by the magnetic field and added to the force in which it struck the primer.
Springfield must have had MRIs in mind when they designed their 1911s with a titanium firing pin and without the Colt series 80 style internal safety.
I love reading stuff like this. The stranger, the better.
2. Always keep a firearm pointed in a safe direction.
3. Keep your finger off the trigger until you are ready to shoot.
4. Always be sure of your target and know what is behind it along the bullet's trajectory.
5. Never bring your firearm near an incredibly strong magnet.
What jumps off the page is the tech allowing the officer to enter the MR suite with the pistol. It should have been secured in another room, the dressing room should have offered a lockable drawer with a non-magnetic key which would have remained with the officer. Allowing any ferrous object, of any size, near a powered up MR is foolish to fatal depending on circumstance. The tech should be fired over the incident.
The screening process just to get into the room with the magnet is intended to avoid anything like this from happening. If the slug had hit a vital part of the MR unit, that would have been a 1.5 million dollar mistake.
1991 pistol through out the article?
Well it was a 1991 model... ever seen the Colt's from that time?
They're prominently (and ugly) marked as such.
I'm betting a MRI model 1911 wouldn't be a big seller. How would a titanium or scandium hand gun do?
I have done that.
I too was intrigued by the use of the uncommon word "retrograde". More to the point, I have sometimes wondered what the real practical application of the slide-locking function of some manual safeties was. Now I know - it's to prevent 1911s from going full-auto if inadvertently dropped into an MRI machine. Seriously though, this is the opposite of an out-of-battery firing - it's more of a too-much-in-battery firing.
It's nice to see an article that sticks to facts. Contrast it to what would happen if the media latched onto this; "Gristly deaths narrowly averted; Horror insues when eeeevil gun fires itself in local clinic. . ."
Nope, the manual saftey kept the slide from functioning.
"1991 vs. 1911
For those wondering what the difference is between these pistols, the fact is there really is none. Back in 1991 Colt decided to market an economy version of their basic Series 80 Government Model. The polished blue was changed to an all-matte parkerized (later blue) finish, checkered rubber grip panels were used, and the serial number sequence was made similar to US military M1911A1 pistols. The resulting pistol was cleverly named "M1991A1", after the year of introduction. Mechanically however they are the same as any other Colt Series 80, 1911-type pistol."
Because the slide was locked would there be an increase in chamber pressure (I guess the pressure would be the same until the bullet leaves the barrel, then gasses leave the barrel and pressure can't build further), increased force of the cartridge on the breechface (I'm thinking it'd be the same, just with less work accomplished), increased muzzle blast (bet so), and/or recoil (I'll guess yes)? Anything else?
It sounds preventable with:
Ti firing pin
stiffer fp spring
stiffer fp block spring
Again, anything else?
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