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AR15.COM
7/30/2014 4:52:19 PM EDT
OK, I put the Pierce Extension on 3 of my G19 mags. Now they don't reliably lock back and sometimes cause a hangup on the feed ramp that results in a FTF.
Do I need to replace the springs in the mags as well or what?

Is this common?
7/30/2014 5:23:02 PM EDT
[#1]
I've only used extensions on my G26 mags or my G18 33rd mags, and never had problems with them on those two magazines.

But, if you're not locking back, then you need to do something to help out the magazine springs or get rid of the extensions.

ETA if you really want 17rd mags on the G19, just buy G17 mags - y'know they gonna work.
7/30/2014 5:31:08 PM EDT
[#2]
yeah... I know. But they look cooler
7/30/2014 6:58:17 PM EDT
[#3]
Solution, ditch the extensions.

Do you really need them for a G19?  If you want more capacity use G17 mags.