I had my first catastrophic failure with my B&T APC 556, specifically an out-of-battery ignition. When I pulled the trigger I heard two distinct discharges in rapid succession, my magazine burst apart and the rifle started smoking out of every hole. The bolt carrier group was stuck halfway.
Luckily, I was not injured. I did feel something hit my face. I think it was plastic from the magazine window. I am glad I was wearing safety glasses. So this is also your regularly scheduled reminder to wear proper eye protection when shooting firearms.
Check out what what I found when I inspected the rifle