Hi Charles and welcome. There is a Sub 2000 17 that takes full sized Glock 9mm magazines and a Sub 2000 19 that takes shorter g19 magazines and any of the full size Glock 9mm magazines. The difference is the g17 Sub 2000 has a longer pistol grip. Cheers and stay safe!

it will depend on the kel tec model please repost with a item number or upc so we can give you the correct answer

Depends on which model you get.
One takes 17/22 the other takes 19/23.

Hi Charles, the Kel Tec Sub 2000 comes in 2 different versions, one accepts Glock 17/22 mags and one accepts Glock 19/23 mags. So it depends on which model you get. (There is actually a 3rd model that does not take Glock mags)
Stay safe & have a great day!