Re: Miltary testing
No idea whether the Tavor has a bottle opener attachment.
A Swedish friend told me that when he was doing his military service he was issued with a bottle-opener as part of his official kit. Earlier trainees had discovered that the latch/hook on the standard rifle ammunition clip was perfect for opening bottles, but after it had been used for that a few times it got bent enough to cause the weapon to jam. I couldn't tell you the type of rifle, though.