I've learned that ordering S&W mags can be very tricky. Virtually none of the websites will tell what exact pistol they're actually for or what the overall length is. It also doesn't help that salespeople have no clue either. I went in a gun shop yesterday and inquired about 2.0C mags and the salesman immediately reached for a 12-round 1.0 Compact magazine. He didn't even know what mags the new 2.0 Compact takes. Frankly I'm surprised S&W doesn't even have the spare magazines for the 2.0 Compact SKU'd and available for purchase yet, because you'd think that's the first thing new owners would want to buy.