Hmm... honestly, the whole "aim at the arms" thing seems weird to me.
It's at a -2 to the roll. So unless you're running with A+A+Rifleman/Sniper type characters all around, they'll be down to NPC levels of skills really fast, and the consensus here seems to be "NPC's can't hit shit". So why are the PC's hitting anything then?
Also, make NPC's retreat (and even bring their wounded/dead if possible) as soon as they start taking casualties.
This isn't a video-game. People are very invested in not dying. Especially since there's no war on any more, everyone's just out to survive.
Last session, my players ambushed a VDV recon patrol that were driving in two humvees. They failed their ambush roll, and it became a meeting engagement, but they managed to take out the drivers and one gunner on the first turn.
In the second turn, the enemies managed to switch to the drivers seats, put down suppressive fire and reverse away (fight already started at extreme range).
There was no third turn, and the only dead enemies left were one of the drivers that got pushed out of the car to let the enemy soldier drive away and one of the gunners who flopped out of the car (it was an open-topped humvee).
This meant that the players only got the loot off of two enemies, neither of which had their main weapon equipped (their weapons were in the vehicles). Further more, this also means that the VDV units get to return to Örebro and the 76th to inform them of enemy forces north of them (which is where the players main base is), so now the players are in some serious trouble, and they don't even know it, because they think that recon patrol were some stragglers trying to survive.
In a few sessions time, their little cam is going to get a visit from some BMD-2's and about 50 soldiers after a sniper section has been sent out to recce the area and find the players base. Sure, the players have 3 ATR's, but they only have one rocket each. And they have a .50 cal on an M113, but that's not gonna last long against several BMD's and soldiers with RPG's or worse.
And IF the players should survive all this without having to flee... well, then the general has access to more soldiers and BMD's, and also... artillery.
The little island that the players are calling home will be no more if that is the case.