Great product, easy install, looks great, good texture/grip, and does not add a lot to the magazine like other brand magazine extensions and I’m beyond happy it finally came out! Just a couple weeks before the “high capacity”�� magazine ban in WA state so I got lucky. I’ve been waiting for this product to release. My only complaint and reason I didn’t give it a 5 is due to the 2 in the 13 round magazine =15 round is a little hard to rack the slide to chamber a round but it cycled without any problems �� I for got to load a round in the chamber then insert the 15 round magazine to see if it would function. But I had no issues besides a little hard to rack the slide to chamber the first round. Hopefully it will loosen up over time from use and storing fully loaded. I was only able to put about 100 rounds through both mags… I’m ordering more today before the magazine ban in my state taxes effect in a couple weeks.