Stern defense mad adapter - Stern Defense MAG-AD9 AR-15 Glock 9mm/.40 Magazine Conversion Adapter

Great product. This is my second one I have purchased for a Franklin armory lower build . This adapter from stern has functioned through thousands of rounds and not lost its positioning or moved any through countless tests because of the gob screw and the two spacer screws that other adapters from competitors don’t have. It runs my ets, Glock brand, magpul, and any magazine I have thrown at it. The only possible negative is that if you’re using this product for a cheaper alternative for ammo to train on your bigger caliber rifle, this adapter uses the mag release to hold it in place and instead has a new push button Mp5/ump style mag release. To some this maybe a plus and I don’t have a problem with it, but for training you may have to change your mag release motions or techniques.