Jamie Foxx Keeps His Glock Handy

Jamie Foxx has some brand new high caliber ink -- a 9mm handgun -- which he flashed onstage with Reese Witherspoon.

Jamie's Glock handgun tattoo was on display during his appearance at a Stand Up To Cancer event ... but like he's done in the past -- it's a fake. He got it for his new movie "Baby Driver," which comes out next year.

Handguns or tribal head tatts -- like he got for "Horrible Bosses" -- neither's gonna look good at Thanksgiving dinner. Good thing they're temps.