So you want to take ur secondary and have it shoot your primary? EASY!

1.) Get rid of all ammo BUT LEAVE 1 BULLET!!
2.) Press START and X at the same time
- The START MENU will show up and you can just close that and RESUME ur game
3.) SHOOT! try and see if it worked!
- If it didnt u did 1 of a few things wrong...
a) you didnt hit them at the same time
SOLUTION: TRY IT AGAIN!
b) you had either less or more than 1 SHOT LEFT!
QUESTIONS?! PM ME!!!
P.S. THIS WORKS ON ALL MAPS!! 100% of the time! :)