Your silver one looks like the common style.
But if you look farther down in those Google photos I think there's one/some that look like they other style.
I am no Tec-9 expert. I've never touched one. 
Complete thread:
- Who can identify these magazines? -
woody,
2013-02-26, 17:39
![[*]](themes/default/images/complete_thread.png "Open whole thread")
- Who can identify these magazines? -
Who....me...??,
2013-02-26, 17:47
- Who can identify these magazines? - lee jurras, 2013-02-26, 18:27
- Not Thompson. Tec-9 -
cas,
2013-02-26, 19:00
- Not Thompson. Tec-9 -
woody,
2013-02-26, 19:03
- Your silver one looks like the common style. -
cas,
2013-02-26, 19:43
- Than so to everyone - woody, 2013-02-27, 09:23
- Your silver one looks like the common style. -
cas,
2013-02-26, 19:43
- Not Thompson. Tec-9 -
woody,
2013-02-26, 19:03
- Who can identify these magazines? -
Who....me...??,
2013-02-26, 17:47