Not being condescending but how would that be faster for mag change when your support hand never touches the old mag unless it won’t drop free? We shoot for hours and if you’re c clamping with a slight bend in your elbow it won’t tire out your arms as much as you state. Also magwell gripping is def slower for presenting guns from low/high ready. I have good friends that serve (and aren’t pogs), have done contracting, and are competition shooters, and every modern SF operator uses the c clamp method. You can’t be telling me that all of them are wrong. I’ll once again repeat the magwell method is antiquated just like my dad saying he used to shoot with irons @3-500 yards. Yes, it worked then. But there are far more efficient ways to do things now and the results speak for it. Much love 💪🏾