Searches didn’t come up with much. Has anyone ever used or found a buttstock mag pouch that can hold a 20rd pmag that is not held closed with velcro. I was looking for something like a fastmag. This is for a duty rifle.
CAA has a Pictatinny rail solution similar to what you are speaking about.
I have no experience with these CAA items nor this vendor -
http://www.gunaccessories.com/CommandArms/MagCouplersPouches.asp
I think I’ve got one somewhere I’ll see if I can find it and put up a pic
Thanks. That it what I’m looking for but I’m not sure what the method of attachment is for the buttstock.
What about something like this?

Great idea but the agency would never allow the changing out of the buttstock. Sad but true.
Why not use a RediMag or Magpul coupler?
Agency rules up here are very tight. It has taken the range staff years to fight to get aimpoints. A better buttstock carrier is all that would be allowed
Sorry to hear that. You might contact usmcvet for help with lobbying your agency. He’s a PD chief in New England.