What is a sear?


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P95loser
January 13, 2006, 03:38 PM
I have heard this term frequently on thr and am not farmiliar enough with guns yet to know what this is?
Also, does anyone know of a website or info that gives the general workings of a handgun? There are several parts between all autoloaders that do the same thing and are required and i would like to know all the basic parts and uses of these parts within a handgun.

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MNgoldenbear
January 13, 2006, 03:54 PM
The sear is the part that links the trigger to the hammer/striker, allowing the hammer/striker to be cocked and allowing the trigger to release the hammer/striker.

Not sure about anything on line. I've used the firearms disassembly books (can't remember publisher -- volume for each action type, with many representative firearms in each volume) with good success. Though there are many functions that are the same from gun to gun, many firearms have differrently designed parts to serve those functions. (e.g. a sear in one weapon may not look anything like the sear in another, etc.) Not sure what type of info you're looking for exactly.

TexasRifleman
January 13, 2006, 04:45 PM
Here is an excellent animation of the operation of a 1911.
Click on the image of the STI Trojan for a popup with all kinds of goodies

http://www.m1911.org/1911desc.htm

WayneConrad
January 13, 2006, 05:38 PM
Here is an excellent animation of the operation of a 1911

Those are great animations. Thanks for the link!

Sunray
January 14, 2006, 03:47 AM
TexasSIGman, that has to be the best practical answer to a basic question I've ever seen. Well done.

Jim K
January 14, 2006, 03:34 PM
The description has one common mistake in saying, "... the expanding gazes [sic] produced by the burning powder ... start pushing the bullet down the barrel. At the same time, those same gazes [sic], start pushing the cartridge case and hence, the locked slide and barrel to the rear. These three items, are for the time being, locked together."

The gasses push in every direction with the same force and that pressure does NOT move the slide. The barrel and slide are locked together and the expanding gas cannot unlock them any more than expanding powder gas will unlock a bolt action rifle. What moves the barrel and slide to the rear is recoil resulting from the bullet movement to the front. If the bullet does not move, the pressure will do nothing; the slide will not move and the barrel and slide will not unlock. That is why pistols like the 1911 are referred to as "recoil operated."

The recoil moves the slide and barrel unit to the rear, and an outside element, the link or cam acting on the frame, unlocks them and allows the slide to move back independently, extracting and ejecting the case, then move back into battery, picking up and chambering a fresh round on the way.

Jim

1911Tuner
January 14, 2006, 04:47 PM
:D

Jim...We gonna do this one again?:evil:

JohnKSa
January 14, 2006, 09:41 PM
WARNING! BEFORE reading farther, please read the disclaimer at the end of the post.We gonna do this one again?I have absolutely NO doubt that we will... If not now, then in the not too distant future. ;)

1911Tuner
January 14, 2006, 09:54 PM
WARNING! BEFORE reading farther, please read the disclaimer at the end of the post.I have absolutely NO doubt that we will... If not now, then in the not too distant future. ;)


Excellent!:neener:

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