TX22 GEN 2 magazine difference.

I just picked the gen 2 up an hour ago and noticed a difference between my 16rd mag and 22rd mag. The followers also seem slightly different. What's up with this? Am I missing a part on one?

I just picked the gen 2 up an hour ago and noticed a difference between my 16rd mag and 22rd mag. The followers also seem slightly different. What's up with this? Am I missing a part on one?