http://battlefront.wikia.com/wiki/DC-17_Commando_Pistol

I don't get it... This isn't in Battfront 2... Have I overlooked something?
Because I KNOW BF2 wasn't released after or when TCW was
being made.

I've played BFII for since it came out, and I have NEVER seen this
ingame.

If you read to the bottom of the page you would see that it shows the model for the commando pistol that the Jet Trooper uses in the game underneath that heading. They just showed the more recent model in the profile pic to garnish attention.

No one on Gametoast maintains that wiki, as far as I know. That image is a bit misleading, but that weapon model was introduced into the game by modders, so it isn't entirely incorrect.

I already knew it wasn't in the PC or PS2 versions, I was just starting to wonder if there was a
newer version or the PSP version had some different stuff or something.

Thanks you two for clearing that up.