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DB Alloy Feed Issues (self.help)

submitted 1 month ago by DinnerEnjoyer to c/help

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Hey All,

Went to the range the other day to finally test my DB Alloy build. Before I ever got to the shooting phase, I had issues with the printed Sten mags, so I decided to buy a few surplus mags from Atlantic Firearms. So I got my mags, polished them up, put a little lube around the follower and what not. The mags work fine outside the gun itself.

Got to the range, loaded up my mags, and when I pulled the charging handle, it seems like it is double feeding. The bolt charges two bullets instead of the one. Whatever, tried another mag, same thing. I'm thinking this is on the mags.

Any suggestions?

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[–] Kopsis 1 points 1 month ago

The printed mags usually feed more reliably (when new) than surplus. The problem with the printed mags is that the feed lips are really thin so you have to print with a stiff low-creep material (PET-CF works well). Even then they wear quickly.

With surplus mags you'll need to verify the feed lip geometry (they're often bent/stretched) and you will probably have to tune the location of the mag catch adapter.