Chitchat Firing with no flashes in mussel sounds familar...

[tanwahtiu]

.... like in pap nsf firing blanks in firing range ....

 

[zhihau]

When snipers fire at their targets, the victim will just drop without knowing where the shot came from.

The Las Vegas shooter just need to shoot from behind the curtains and it's good enough- muzzle flashes all masked.