Trumpled (Alternative Leading)

[ElwoodBlues1]

Magazines for the AR-15 hold between 5 and 100 rounds but 20 and 30 round magazines are standard.  Military users of the similar M-16 often tape three magazines together giving rapid access to up to 90 rounds.  Changing magazines takes seconds so magazine capacity is not a limiting factor.

The AR-15 is semi-automatic so the rate of fire is dependant on how fast the shooter can pull the trigger (and change magazines).  I once fired 60 rounds from a semi-automatic rifle in just over a minute (two magazine changes) so shooting around 100 people in a confined area in 5-10 minutes would be relatively easy - if you are cold-blooded enough to carry out such an atrocity.

I understand that the delay in entering the building was due to fears that the gunman had explosives.  I'm not sure how far the armoured vehicle had to travel but that may have been a factor too.

AR-15's are a very quick mag change and shoot 20 rounds in nine seconds, given the shooter had a modded up 100 round mag it would have been easy to shoot a lot of people at once.
My bro in law is in a gun club/collects them and he reckons the big thing with the military style weapons is they dont overheat like older semi autos so you dont have any cool down period which allows you to keep shooting and that a kid could learn to use a AR-15 as they are that easy. They should be banned.....