Got a mag rattle

[EvoXguy]

Bought some HK mags online and one of then has a rattle when fully loaded. Any ideas as to why?

[81turbota]

The loaded mag by itself rattles? A few of my CZ SP-01 and TS mags do this. Don't have a good answer as to why but it may be related in the way the rounds stack against each other. All of my other double stack mags don't have the rattle issue.

[P5Ret]

Probably the follower get a little bit wonky on new mags, will more than likely go away with use. You can tap the bottom of the mag and it will probably straighten itself out until it breaks in.

[Lonestargrizzly]

Some mags do that. As long as it feeds properly...

[EvoXguy]

Yeah its strange. Out of all the other pistol mags I have, none of them do this. As long as it feeds properly then no worries I guess

[fritztkatt]

Got a couple glock and 1911 mags that do that. They match their non-rattling brethren, and work just fine. No idea why.

Only rattle when loaded as well. Nothing when empty.

Now my AR mags... them bastards rattle like crazy until they have a couple rounds in them.