I have been looking at a choate tac stock. There is one made for the "dbm". What style of dbm? I have a plastic cap on the end of my Mag that clips into the stock.

Also, are the Mag extenders on sss for my style of plastic ended mags? From what I've seen on pics, they look like they do not have the same locking in style that I would need.

If the Mag ext are not made for my style, is there other ways to ext my Mag besides cdi?