Well you just told us it only took you a few seconds and it's only a few frames, so i don't really feel like it's worth critiquing.

You're using just a small fraction of the canvas. Looks like the particle effects are decent, but the gunshot lasts way too long. It takes much less than one frame for a bullet to leave a handgun and disappear from view at the distance we can see here.

Put more time and frames into something and then ask us what we think.