Brooke Mueller — Carrying Gun in L.A.

She’s probably the last person who should be handling a firearm — but yesterday in L.A., a cowgirl-hat-wearing Brooke Mueller dropped by a local gun range … and waved around a real-life handgun.

It’s unclear if she actually shot the thing — we hope not — but her rep Steve Honig tells TMZ, “Brooke enjoys sport shooting, and has for some time. She knows how to handle herself at a range and is a very careful and skilled sport shooter.”

No kidding … just look at the focus in those eyes.