Stern defense with bear creek arsenal 9mm upper. - Stern Defense MAG-AD9 AR-15 Glock 9mm/.40 Magazine Conversion Adapter

I first bought the Means Arm Endomag and after me wasted buying it to only finding out it does not work with the current Bear Creek Arsenal 9mm Upper assembly. Even though BCA reviews show that the Mean Arms Endomag work in their 9mm upper, they redesigned the upper but kept the same part number and reviews so it was a bait and switch on their part. I ended up buying this and it worked great except it does not have Last Round open with BCA uppers. I can except this since everything else works fine now but wished it had it last round open but wasted too much money trying to get a combination Frankenstein PPC set up for a 9mm PPC. Other than that, I am happy.