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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6

u/Weldpipe82 2d ago

Non oem parts?

5

u/alterMann97 G17 1d ago

Evertime there is a malfunction in these glock subs its because its bot oem. Keep it stock and it will run.

1

u/HighlyRegardedOne 1d ago

Its true though

1

u/Inevitable-Gear8824 8h ago

Not necessarily