.. Shooting range gremlin

You would need to stun it. First, try to set up a bullet proof shield for you.

Wasn't McKing's car bullet proof?

First, you need the air vent above it.

And crashed the car? Nice.

Take the bullet proof hood. Place it on the bullet hole to make the shield.

It is now sparkling. Now, if you could somehow conduct the electricity into the gremlin.

Water conducts electricity quite nicely.

Set the sprinklers on. You just need some fire.

Confiscate matches from Roy at the holding cell number two. Use the matches on shooting range sprinklers.

You have to fix the sprinkler system, first.

Use the matches on them to fry the gremlin.