I hate that damn firing pin key. we had to field strip our M16s outside in the dark sometimes and if there were a war going on I would be throwing my BCG at the enemy instead of trying to put that thing damn pin in lol
I know a young doctor that used to live in Russia and I showed him that video he said they had to do this all the time in school and that everyone had to service at least 2 years in the military or 3 years if in the navy.
most 12th graders these days are only good at disassembling a Twinkie box...
It's very simple to do yourself. just need a blow dryer and some time. heat the glass and peel it up slowly I used a business card clean the remaining glue with alcohol or goof off and then carefully install the new glass I did mine for 7 dollars and an hour of my time.
That was a ***** ass grenade to just blow of his leg below the knee...That would have been a multi-killamanjaro...but damn I bet it still screwed those guys in the front up pretty good.