The people leading the move to disarm the populace are currently focused on high capacity magazines. I've mentioned in previous posts how easy it is to change magazines in the AR-15. See Mega-maga-phobia: The fear of large capacity magazines. The point was that the time is not significant enough to matter in a Sandy Hook school active shooter situation. And therefore banning hi cap mags would be pointless, other than making the gun control advocates feel good and encouraging them toward some other anti-gun measure.
Here's an even better video showing a magazine change. The shooter loads 20 rounds into a high capacity magazine and fires all twenty bullets through the AR-15 in 15.30 seconds. Then he fires 10 rounds from a single magazine, withdraws the empty magazine, inserts a second magazine containing 10 rounds, and resumes shooting until that magazine is empty. The elapsed time there was 15.57 seconds -- a difference of 27 seconds. Here's a link to the video. (Thanks, S.M.)
A half minute isn't significant enough to start banning firearm paraphernalia, especially at a time when citizens are in a highly suspicious mood about an administration that seems bent on disarming them.