Quote Originally Posted by jim View Post
like some after market mags they need to be fitted to the mag release catch. insert mag and see where it sits in relationship to the mag release. you will more than likely have to file some of the mags rear tang's bottom side a little. i had to do this to some unmarked waffle mags i found in my parts bin. little filing of the bottom and they fit good across the board in the AK's
Yeah the rear tab on the Tapco is a bit thicker, but slightly shallower than the rear tab on the Circle 10. However, on my new 30 round C-10, the plastic coating on the front tab peeled off after a few practice mag change sessions, yet it still snaps in perfectly.