Using the revolver. I love it because it doesn't require magazines, but the gun still sometimes fails to eject shells unless you tap V a lot and spin the cylinder while holding V. And if you only have a few bullets and they get placed in a non-linear order (happens if the cylinder is spinning, as well as randomly sometimes), having that empty *click* between rounds makes me so jumpy when trying to spam a Turret down.
I find that the flap-flaps aren't a huge deal, because you can actually run faster than them if you spam W, and their poor tracking sends them into a HUGE swerve if you take a sudden turn, giving you plenty of time to make a snapshot.
Well, the thing about turrets is that if you're above, below, or at an angle to them, your bullets ain't doing shit.
I find that aiming for the brown camera pod on the front of the turret results in an easy disable, since it almost never deflects.
Probably the worst enemy I've ever had to face was a flap-flap that I somehow broke the motor on but not the camera or shockpod. You walk right next to it thinking it's donezo but nope, it gets you in the foot anyway and you have a heart attack. Was sooo pissed because I had found like 3 full glock magazines that life.