Edgar,
With all respects to the Rangers and their patrols, the arming of them to an extent of a fighting patrol would be a bad idea, and here are my reasons why:
1) A fighting patrol, generally have backup whether it be Pl, Coy, Air Support, Arty what ever. Support is 'readily available'. Now, when you're up in the land of the Polar Bears, your nearest back up could take hours, even DAYS to arrive. NO active air support is available, the nearest Ranger patrol could also be hours or days away. It just would not be feasible for a Ranger patrol to actively engage any suspected 'enemy'.
2) To properly equip Rangers with more weaponry then they require will mean that an increased allotment of ammunition which will rarely if ever be fired, would be stored. STORED. Currently I can think of better places for that ammo to be going then stored.
3) Increased weaponry also means increased training time, and then we delve into other things. FredRanger went on a watered down BMQ course, if we're to upgrade, up-arm all the Ranger patrols and Rangers, it means a 'watered' down version of ANY training would no longer suffice. This means stretching the training system even more then it is currently happening. It means that instead of doing a BMQ or its variant so that they are gtg on basic things military, we now have to decide whether or not we should send them to BIQ or a variant of BIQ. Then brush up on Arctic Warfare (which these ladies and gents are already somewhat familiar with, but humor me), all of which takes a large amount of time. The system is needed right now to pump out RegF/PRes troops for missions, now I'm not saying Rangers don't play a vital role, it's just that it would be tough to do.
4) Finally, up arming them with C-9s and other weapons does not alleviate the problem of an ease in the supply system. Previously only 1 type of ammo need to be shipped and considered for the North, now you're looking at 5.56, 7.62, Frags, SRAWW L, 40mm Grenades... lots of things to be stored and lots of logistiks to be worked out.
The primary role of the Rangers currently are good. Their light role capabilities are sound and are quite effective. If we increase the amount of equipment to be carried, it would and could possibly limit their range, mobility, and effectiveness. Space previously used to carry food or extra fuel, are now taken up by 40mm, extra C-9 boxes, so on and so forth. Many native scouts during WWII in Papa Newguinea, Phillipines, China, Guam were all lightly armed and lightly equipped. This made them agile, quick and easy to deploy, which made them excellent sneak and peak, reccon troops. The #1 rule of Recce is to see without being seen, not to get into a firefight...
Just my 2 rupees.
MT.