Piggy named Hambo has a friend in prison so it takes some more guys, destroys bunch of policemen and all... will be fine. But not with force but using your brain and good aiming.
Stand, fly or slide, but you have to aim well and hit some pigs with your gun. They are mostly hidden behind some obstacles, trampoline, wall so it’s good idea to use more useful gun for every part, bouncing can be good as well. Think a bit and you find the solution.