Show of hands...
How many really believe he was cleaning it when it went off?
Anybody.... Anybody...
All we can say is he just did it all wrong.
Could have been many things, I doubt it was cleaning.
I have had 2 ADs each outside and I know exactly what happened. In both cases the gun was pointed in a safe direction.
1. I was 17 1970 and took the safety off ready to shoot a bunny. Then he stopped moving in the brush.
I put the 12 ga at port arms.
LOOKING hard for him.
He ran , I squeezed >>>>>>>> BOOM!
Felt stupid but all body parts remained in tact.
2. As I was taught in the navy. I cleared my gun after a jam.
[ so I thought ] It is hard to see the chamber on an HK91 now.
After removing my magazine, I retracted the bolt, nothing came out. I pointed it skyward pulled the trigger >>>> BOOM!
Lessons learned, work the action several times before dropping the hammer.
Felt stupid again 1992.