Bump fire stock modification.
One of the weapons (possibly two) were full auto though. Read that somewhere. Might have been the AK as those are easy to modify. He had one to fire at hotel security and lightly armed police.
Two officers were on his floor within 10 minutes. They held back and waited for SWAT to arrive - though every mass casualty training protocol course tells LEO to engage immediately. Took 72 minutes from start to finish. That’s forever.
Yes. I understand, but one of the two guns shown is a semi-auto DDM4 with the standard, factory DD stock, and an attached bi-pod (it is 5.56mm, too). Up to 4 DD rifles were found on location.
Any “civilian” DDM4 would be modded from its original semiauto function in order to fire full auto, unless he went to some real trouble and paid out some heavy cash. But they do make full auto versions (they supply for military).
DD is a solid, America-first company. This is a real FU to them as this could get them very unfair attention.