My Guns Hot!

Did your gun just go up while you were running about? A member from the opposite team must be in visible range or is making noises behind you.

If you equip your grenades, people will not get gun up around you. Try lying in a dark corner with your grenades/mines on and see what I mean, people will run right by/over you. Also try to keep your grenades equiped while running around, then when you see an opponent hit L1+R1 to switch on your primary and fire.