It's Sharp Shooter, but you wield a M4A1 now! W, A, and D to move use the mouse to aim and shoot. if the targets hits the ground, that's skill issue, how can you even miss with THAT gun? I'm pretty sure the magazine has like 50 ammo, but press R to reset btw N to change music, and M to mute it if you want
Thanks @DarkLava also uh yea this is clearly a joke