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by Excaliber
Mon Feb 15, 2010 6:36 pm
Forum: General Gun, Shooting & Equipment Discussion
Topic: Hammer fired or Striker fired
Replies: 16
Views: 2982

Re: Hammer fired or Striker fired

surprise_i'm_armed wrote:Anyone:
In some previous discussion on the forum, someone mentioned
that a 1911 in Condition 1 may appear dangerous to some,
with the hammer cocked back.

But that a striker-fired weapon with one in the pipe is essentially
in the same ready-to-fire condition, but without the strong visual
cue as the 1911.

Can anyone please comment on the "safety" mechanisms involved
in a 1911 manual safety vs. a manual safety on a striker-fired
firearm? Are they each as effective at preventing the weapon
from firing?

Thanks in advance.

SIA

A series 80 1911 has a firing pin safety plunger which must be released by trigger action before the firing pin can strike the cartridge's primer. Most modern striker fired pistols (e.g., Glock, Springfield XD, etc.) have a similar mechanism. When operated as designed, they will not fire unless the trigger is moved fully to the rear. This action moves the safety plunger to a position where the striker or firing pin can move past it to strike the primer.

A series 70 (original firing system) 1911 does not have a firing pin safety plunger, but it does have a grip safety that must be depressed before the trigger can be pulled, and a manual thumb safety as well. It is possible to drop one of these guns in a way that causes a cocked hammer to slip off the sear, break the secondary hammer catch designed to prevent discharge in this case, and fire the weapon. It can also discharge by inertial movement of the firing pin against the primer if dropped straight down on a hard surface. An extra power firing pin spring can go a long ways toward minimizing this possibility.

With all guns, the primary safety is always the shooter who keeps his finger off the trigger until he has made a decision to fire upon an intended target with a safe backstop.
by Excaliber
Mon Feb 15, 2010 6:27 pm
Forum: General Gun, Shooting & Equipment Discussion
Topic: Hammer fired or Striker fired
Replies: 16
Views: 2982

Re: Hammer fired or Striker fired

Mike from Texas wrote:SIA, that's partially true.

A Glock is not cocked whatsoever when it is in normal condition. As part of the trigger pull, it places the striker under tension, therefore a stiffer trigger pull.

The Springfield XD IS cocked at rest, hence the reason the trigger pull is lighter and the presence of the cocked striker indicator at the rear of the slide.
Well, not exactly.

A Glock that has had the slide cycled to place a round in the chamber has a partially cocked striker. It is neither a true double action, nor a true single action. That's why Glock minted the term "Glock Safe Action" to describe it. You can watch a video of the interior parts movement as the pistol cycles here. You might have to watch it a couple of times, but it clearly shows that the striker is well back from the primer by the time the slide moves into battery. Pulling the trigger moves the striker to the fully cocked position and then releases it.

The Springfield XD is a true single action, in that the striker is fully cocked by the action of the slide and the trigger only trips the sear to release it.

As a general rule, a single action firearm (e.g. 1911, XD, or a cocked revolver) will have a significantly lighter trigger pull than any double action gun.

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