This is the actual quote:
Do you understand the bullet out of an AR-15 travels 5 occasions as quickly as a bullet shot out of every other gun …?
The muzzle velocity of an AR-15 (which is to say, the velocity at which the bullet travels when it leaves the rifle) is about 3300 ft per second (this is an anti-AR-15 Washington Month-to-month article confirming that). Different rifles have muzzle velocities in the identical common vary, 2500-4000 ft per second or so in accordance with this listing, or 2700-3150 on this listing (PDF p. 45), although the speed can also be influenced in some measure by barrel size. If the AR-15 bullets are sooner than most rifles (not “every other” rifles), they’re solely barely sooner.
President Biden additionally mentioned, in the identical sentence, that bullets from an AR-15 “can pierce Kevlar.” That’s true, however solely as a result of it is true of many rifles typically (see PDF pp. 38-39).
One can say what one will about whether or not banning AR-15’s is prone to cut back deaths. (I doubt that it’ll, both for mass capturing deaths or murder deaths extra typically.) Nevertheless it appears fairly clear that President Biden’s argument for why it might achieve this isn’t right.