Learn this technique and you will be unstoppable. You can shoot twice as many bullets with the Battle Rifle.

Double Shot RRX

This button sequence will take some practice, but is well worth the advantage gained. Grab a battle rifle. Press R, then R, and then the X in rapid succession. Keep practicing until you master the timing. You've got it when the battle rifle fires twice. It's like making a more fully semi-automatic weapon.

Bonus Tip!

Press RRX then YY and then RRX again. Master this one and you'll be shooting multiple double shots. You can RRX YY RRX YY RRX continually.