BLUE Muzzle Flash/Gun Blast (2 Pack) EFFECT ONLY Star Wars/Sci-Fi | eBay
Mighty Micros: The Flash™ vs. Captain Cold™ 76063 | DC | Buy online at the Official LEGO® Shop US
I don't know if someone done something similar before, but anyways, I just wanted to share my idea for a Lego muzzle flash, been using it for years now : r/lego