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A few months ago we were discussing the removal/replacement of AK fsb's. One poster described a sound method using a freezer, a mapp torch, a 2lb hammer, and some wood - but I can't find this post! Are the old posts gone? Does anyone have the process handy?

Thanks.

Eli
 

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Here's a good tutorial on changing the FSB:

http://www.gunsnet.net/forums/showthread.php?t=110911

Note that I don't think a really hot torch is needed. It's very easy to over heat the barrel, and there's no real need to get things that hot.
What you're really doing is warming up the FSB to make it expand. It will only expand so much, and heating up with a hotter torch does nothing.

By the same token, over heating the new FSB does nothing either.
Put the barrel in a freezer for a few hours, and the FSB in the oven at 350 for 30 minutes. That's plenty.
 

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What REALLY happens to a block of metal with a hole in it when you heat it up?

As the metal expands, the hole diameter shrinks :eek:
 

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The trick is to heat the sight support but not the barrel, or as much as you can.

The sight support will hopefully expand just enough to get it off, before the barrel expands too.

Heating super hot does little except ruin barrels.
If you aren't going to use the sight support, cut it off, it's easier.
 
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