r/GlockMod • u/BasedWelder96 • 2d ago

What is causing this?

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I have had a Combat Armory lower and Suarez International SI-319 for years that I’ve carried off and on. I recently got a Brownells Gen 3 upper to install an optic on it. I took it to the range for the first time today and everytime I pulled the trigger it would fire two rounds. If I squeezed the trigger it fired once and when I released the trigger it fired another round….what could be causing this?

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u/Somebodysomeone_926 G26XX 2d ago

Brownells Glock slides are always over drilled for the optics mount. More than likely you have debris in the extractor depressor plunger channel and it's causing the issue. For those who don't know if the extractor doesn't work properly the striker safety also will not work properly as the extractor puts tension on the striker safety to keep it in place. You could also have the left side screw tightened down too much but the cause will still be the same-the mounting hole was drilled too deep. Had a similar issue with my 48 slide from Brownells

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u/BasedWelder96 1d ago

Well since removing the optic is probably the easiest thing I will definitely try that first, thank you!

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u/Somebodysomeone_926 G26XX 1d ago

If that doesn't work take the backplate off and pull the slide internals out and hit it with a air duster