![]() Next, quench the parts in room temperature used engine oil. Tin Man Technologies (TM Tech), who I got mine from years ago and you will need to search around for it or find what some call a jeweler’s torch I have a giant Journeyman II set but find it too big and cumbersome for stuff like this. I’ve had mine for over 10 years and never had a problem. It is known as a Meco Midget and the thing is awesome for sheet metal work. I tend to use my sheet metal/jewelers oxy-acetelene torch. Some guys use magnets and stop the heathing when magnetism is lost, some use marker/applied heat indicators – there are many ways to do it. The process is simple, I heat them up with a torch to dull to medium orange, which comes out to around 1500-1600F. When I would get flats and rails from AK-Builder for whatever I was doing, I’d do all the lower rails at once and store them oiled in a bag for later use. Some guys just heat treat the tip but I go for overkill. I like to heat treat my entire lower rails before I install them.
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