Ready, aim, fire!

Kourtney's not soccer mom, folks; she's not hitting a field or a court or a stadium with her kids on a Friday afternoon ... she's at the gun range!

Okay -- so disclaimer -- it was a paintball gun range. And it was for an episode of Keeping Up With the Kardashians. But still! Aren't Mason, 7, and Penelope, 4, a little young to be shooting guns of any kind?

Auntie Khloe went along for the "fun" and the ladies dressed in head-to-toe battle gear, including protective face masks.

Meanwhile, the kids' dad Scott Disick is back in town after disappearing for a month following the family's vacation in Costa Rica. Since we first spotted him back in LA a few days ago, he's been out and about with friends, but we haven't seen him with Kourtney or with the kids. Yesterday, as the kids were paintballing, he was 'balling' at Barneys, buying some new duds ... because wouldn't you rather be buying sh*t instead of hanging out with your kids?!