The film
Man of the Year (Robin Williams, 2006) features a proper paintball game.

"Eleanor! We're going paintballing! I brought you some camoflage and thermals 'cause it's gonna be cold up there."
President-Elect Tom Dobbs (Robin Williams) arrives to take Elanor Green (Laura Linney) on "a little post-Thanksgiving outing".

From there we jump right into the action, with Tom and Elanor on the red team, against a group of yellow players.

Including this fellow, seen several times in the reused footage, who seems to have misplaced his loader.

Quote from President-Elect Tom Dobbs: "Aaaaaaahhhhh!"

Ladies and gentlemen: Robin Williams in full paintball gear.

Almost all the players are carrying PMI Piranha GTI eForce markers equipped with standard 200 round loaders and
steel 9-ounce CO2 tanks. They're wearing PMI Extreme Rage Xray goggles, and what I believe are Redz chest protectors.
I believe those are Empire gloves, since they say "Evil"

Our intrepid yellow team, despite utilizing neither cover nor loader, presses the attack.

Elanor turns to run, giving us a look at the one odd marker. Which is truly odd, as it's a now-rare
Tippmann C3 pump,
which was a short-lived, unique marker that ran on
propane. Note the pump is slid all the way back.

She tries to hide behind, or team up with, Dobbs. Note here, after a quick jump cut, the pump is back forward.
A good look at the 16-ounce propane tank too.

Naturally, one of the many un-goggled Secret Service agents take a couple stray balls.

Finally, Dobbs' marker burps empty.

He checks his hopper and sure enough, he's out of ammo.

Elanor tells him to stand up, so he does, while saying "I'm out!" And so, of course, gets shot.
Where do movie studios even
get blood-red paint?

The yellow team enthusiastically peppers away at both of them before finally running out of ammo themselves.
The player at the left is wearing JT Invader goggles.

As they're walking off the field, Tom and Elanor are talking, and
players have their masks up or off, but no barrels plugs are seen.
Still, actually a pretty decent- relatively speaking- representation of the sport.