I am thinking of buying these mags but im not 100 percent that they are pre ban. The seller claims them to be gen 2 pre bans.

Appears to be 12 round Magazines.

They are 15 rounders

Quoted: I am thinking of buying these mags but im not 100 percent that they are pre ban. The seller claims them to be gen 2 pre bans. san1.atlanta.gbhinc.com/GB/105245000/105245576/pix750095796.jpg san1.atlanta.gbhinc.com/GB/105245000/105245576/pix750095750.jpg

They are pre-ban....

I too just picked up a pre ban 17 round mag. I'm told that the 9mm font on top of the mag is printed differently on new mags. Also, the round count number holes on back aren't parrarel. Is this a correct way of determining Glock pre ban mags?

Here's a pic comparing the mags.  

The two on the left are pre-ban.  Notice the rounded "U" shape on the NFML mag, and the location of the caliber designation on the pre-ban FML mag.

The two on the right are not pre-bans.  One should speak for itself, and the other is a new-production magazine.  Notice how the caliber designation is up higher.  This is because they did not lower it after they eliminated the Restricted markings.

Those G22 mags you posted a pic of are definately pre-bans.