At 52 seconds your thumb comes off the magazine release under recoil -
In the 1 min 20 sec time on your second attempt to shoot single handed - watch ALL of your fingers as your trigger finger pulls the trigger, ALL of your other fingers clench the frame - your thumb is over the mag release while the rest of your fingers are tightening up. The mag drops again.
Can't comment on your friend with the black shirt.
PLEASE REVIEW HOW YOU CHARGE THE WEAPON ! ! ! ! !
@ 21 sec.
@ 43 sec.
@ 1 Min 14 sec.
@ 1 Min 35 sec.
@ 1 Min 48 sec.
@ 2 Min 42 sec.
Every single time someone on the provided video chambers a live round - a finger was on the trigger.
Good luck.