Beat gun course 2 was a mission in Jak 3. Tess improved the gun course to simulate some of the new enemy tactics and asked Jak to try it out.
Walkthrough[]
See also: Wave Concussor gun course
This time, you can use both the Scatter Gun and the Wave Concussor, with the latter being the weapon of choice here. The majority of encounters during this course are cases where you are attacked by many enemies at once, forcing you to use the concussor's large area of effect. If, at any point, there are civilians nearby, resort to using melee attacks (while charging the concussor) to get rid of the enemies.
As long as you keep the gun charged and able to fire quickly, you can rack up the needed 11,000 points.