Category Archives: Shop work

Tools and techniques for use in the gunmaker’s shop.

Making a chamber reamer

I need a chamber reamer to cut the chamber for the DI .45 carbine, so now’s a good time to demonstrate making one. The first step is to acquire chamber drawings. These can be found in a number of places. … Continue reading

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Making Wire Springs, Part III. Torsion Springs

Torsion Springs The final wire spring to cover is a torsion spring.  In its simplest incarnation a torsion spring is just a stick of music wire with a few twists, usually 2-5, wound on a mandrel, with the ends left … Continue reading

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Making Wire Springs. Part II: Compression Springs

Compression springs Once you’ve wound a few extension springs, you’re ready to progress to compression springs.  Compression springs are widely used in firearms, and being able to make your own opens a lot of doors in your own designs as … Continue reading

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Making Wire Springs. Part 1: Compression Springs

Making wire springs This is the first of three parts on making wire springs. In this part we’ll discuss the making of wire springs in general, and the specifics of making wire extension springs.  Extension springs are occasionally used in … Continue reading

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Chambering and Installing an AR-15 Barrel

The following documents the build of an AR-15 upper chambered for the .300 Whisper, also called the .30-221 Remington or .300-221.  This build utilizes a factory-made upper receiver frame (the same one used for .223), so the predominate focus is … Continue reading

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