Here's Rvrctyrngr on the same stage...
and on another one where you have to engage multiple BGs through a window...
Here's Jay M. on the window stage; note the trigger finger alongside the frame and good muzzle control to keep from sweeping himself as he opens the window...

and on another one where you have to engage multiple BGs through a window...

Here's Jay M. on the window stage; note the trigger finger alongside the frame and good muzzle control to keep from sweeping himself as he opens the window...

