I just received my glock 20, just got it home and noticed the front site is really loose, as it I can jiggle it every which way. I am able to push it back into place. When I break the firearm down and reassemble the barrel appears to be the culprit and popping it loose once the barrel is slid back into place.

While I am not concerned as I know sites are replaceable, I am not sure how to fix it on my own. Any ideas?

The barrel should not be coming anywhere near the front sight.

Put some Locktite on it, tighten it down, and call it a day.

no idea what could be hitting it then, as it is locked back in, reassembled the pistol and out it comes again

Edit:

It may have been me moving the barrel back into place that push it back out, never messed with tightening a front site.

need loctite

ya apparently a 3/16 thin wall nut, all I have to do is tighten, so I will throw some blue loctite on. thanks guys, I'm just overly cautious by nature