Category Archives: Gunsmithing

Articles about modifying and fixing existing firearms

Machining an AR-15 upper receiver forging – part III

Step 3, Drilling the lugs. We’re finally going to create the actual reference point – the pivot pin hole in the front lug.  While this could be done in a vise, using a 1-2-3 block on the bottom of the … Continue reading

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Machining an AR-15 upper receiver forging – part II

Setup 2, the deck Next we’ll machine the deck flat and cut the lugs to size.  In doing so, we’ll establish a reference to the position of the upper along the line established in the first setup.  The real reference … Continue reading

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Machining AR-15 upper receiver forgings part I – redux

Machining the upper receiver of an AR-15 is an intermediate to advanced machining project.  It is more difficult to make, on manual machines, than the lower receiver, and should only be undertaken by those who already possess a firm grasp … Continue reading

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Machining AR-15 upper forgings

It takes so long to generate a meaningful post (complete project) that we’re going to try posting progress pics.  Consider these a teaser.  When the project is done, I’ll publish a complete tutorial, with dimensions.  Until then, here’s what we’re … Continue reading

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Making a Hammer-Fired Trigger Module for Prototyping

One of the things I’d like to attempt as this site builds up to actual design of firearms, is to create some modular pieces that can be used when other parts of the design are the point of interest. As … Continue reading

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