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My Milestag sniper rifle needs a trigger, so I CADed one up today. It uses a small, sealed microswitch from Farnell.
I'm very limited by the amount of height and width I have available in the wooden stock. This switch enabled me to create a switch module only 20mm high and 15mm wide:
Here are the internals after printing, you can see the cam operation on the leaf microswitch:
And with the top section in place, note the countersunk self tap screws to keep the with to 15mm:
After marking the dimensions on the underside of the stock, I routed and chiselled a recess for the trigger unit to fit in. Here it is in close up:
And complete with fitted front barrel clamps:
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