I did measure mag catch hole. Identical to other mags. Yes i have tried the mag tube by itself with no base plate. The empty mag tube with no base plate, spring, or follower doesnt seat. Doesnt seem to have the wiggle room the 9mm mag has
Hmmmm. Weird. Do you have another 2011 or know someone else with one where you can try the mags?
i have two. They dont seat in either one