Point Of Order!

People keep saying that the San Bernardino terrorists' AR15s were purchased legally, and then illegally modified.

The modifications WERE illegal, but the ARs were pruchased as part of a starw sale:
San Bernardino shooter used friend to dodge gun check, may have planned larger attack, sources say - LA Times

...one of the shooters in last week’s massacre at a San Bernardino social services center, asked a friend to buy two rifles used in the attack so he could dodge a federal background check and also may have been planning an even larger assault, according to government sources familiar with the ever-widening investigation.

One of the sources said Thursday that {dirtbag who's name I will not repeat} wanted to make sure “the guns were not tied back to him” when he asked Enrique Marquez to make the purchases at a Southern California gun store in 2011 or 2012. {DwnIwnr} feared he “wouldn’t pass a background check” if he attempted to acquire the military-style rifles on his own, the source said.

Gee, illegal activity facilitated terrorism.Who'd'u thunk it?

Not that I expect this fact to penetrate the hate-filled, bigoted skulls of those engaged in the "Let's Ban Guns!" blooddance.