686 .357 disassemble/reassemble question

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So, emboldened by my quick work of the lock removal I decided to tear down and re-assemble my 686. Tear down was simple, and aside from a pin launching across the room (which thankfully I found) and not knowing what the hammer block (at least I think that's what it's called) was when it fell out it went back together easily. Then I tried to dry fire it.

Must make sure that when you install that little clip with the two pegs on the hammer (that holds the spring) you put it in at the right angle.

I also launched the rebound assembly into my shirt, luckily that was also an easy find.

This leads me to my question, when googling how how to get that assemble back in, I happened across a video of Larry Potterfield installing new wolf springs on a smith wheel gun and using some type of tool to compress the spring. What is it called?

http://www.glock-guns.com/videodetail/5YWDK3OS7IA.aspx

You can see it in this video.

Thanks.
 
I didn't look at the video, but assuming that you're talking about the spring and rebound slide, the tool they sell is basically a spanner bit in an offset spinner handle. You can do the same job with a small slotted screwdriver if you're careful and wear glasses.
 
^ thanks!

I've been taking apart my firearms now, looking at parts online and trying to get a better understanding of why a certain part will make the gun do whatever it's advertised (typically better trigger).
This is fascinating to me. I wish I had done it sooner.
 
^^not saying I've become an engineer overnight, have to take at face value that the physical properties of things as I read them to be. In my non-engineer's viewpoint though it's still very interesting.
 
JRyan--I just bought a 686-5 with a 2.5" barrel. How difficult is it to remove the lock? This is the very first revolver I've purchased and all my other guns are 1911's.

Yep, what Jasons said. Really easy. Your spring may be different and you may have the hammer block in there as well I'm guessing, but it's basically the same. You can see where to hammer block back by means of the side plate (hopefully I'm calling it the right thing, looks like a weird key. The side plate has a groove for it.
 
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