Sample of one, of course, but mine runs like a top. I've never had it not lock back on empty, which seems to be the overwhelming gripe about the BAD from other people.
Training to clear malfunctions isn't just because you have shoddy equipment, it's because if bad shit's gonna happen, it's gonna happen at the worst possible time. The BAD I have rides on a Noveske, but simply because I have a great piece of equipment doesn't mean I shouldn't prepare for the excrement to hit the oscillator. I realize that's not what you meant, but it's kinda how it sounded.
I can't envision a shooting position that would bring the lever into contact with a hard surface. Prone right, nothing there but sky. Prone left, can't see how you can get the gun that low to the ground as you'd most likely be shooting at a slightly upward angle anyways. Barricade right, don't get that close to the barricade (sticking muzzle out is bayud, mmmkay). Barricade left, same as right. Please elaborate.
*ETA* For the record, I like the BAD. It's not the end all, be all of gun parts, but I find it functional. The day it ceases to become functional or becomes a hindrance, it'll come off the gun.