It is meant to be unplugged for debris and water if shooting i a wey environment Glock leaves them unplugged from the factory, and frankly, I cannot see a reason to plug it.
Yep, and it's not for a plugI leave mine unplugged, and just blow in it every once in a while to remove some of the dust. I figure that it would be pretty easy for Glock to not have the hole, so they must have a reason for it being there.
No plug. Doesn't the xd come "unplugged"???
2 of the most reliable polymer combat pistol come factory without a plug
That should tell ya something.
Yes, it tells us that reload times were not on the designer's criteria.