That nugget seems to have come from the PPCLI Roto 1 or 2. There were several blogs and internet digests that were circulating as everybody was very curious to know how the boys were doing and what was working. The way I remember the 6 and 4 comment was, 6 mags to start the firefight and 4 to finish it.
from another forum:
"boondocksaint
Re: Lessons for the Infantry in Afghanistan
« Reply #12 on: September 28, 2006, 17:33:38 »
I've almost got an AAR for a TIC in Garmser finished, but forgot to add the 'lessons learned' part of the Sangin fight
1- grenades, use lots of grenades, between the 4 of us we had 1 grenade left at the end of the fight
2- we generally carried 10 mags- rule of thumb for my guys was 6 mags to pick a fight, and 4 to get you out, meaning that was a transitional point for us if we had no immediate resup, at the end of that fight we had 2 ish mags each and last drum on C-9
3- M-72's arm effectively at 25m, which is the range that fight started at, then it got close- the M-72 is the 'Canadian RPG', timmie hates them, it penetrated a wall that was about a foot thick and had a great cone' effect on the far side
4-all of the drills worked-practice whatever drills your using alot, gunfighter program is awesome
5- ambush drill can/should be on call, once suppresion is achieved- no use rushing until then
6- soft soil is good- the RPG round went in deep before going off
7- yelling 'hey you' should not be used to initiate contact.... "