Based off of what I have right now in my possession, this is what I'd use:
Main Battle Rifle: Remington 700 in .30-06. I have a pound of powder and 800 primers. Plenty of brass, but low on bullets. Maybe 50 rounds of crappy Olympic stashed away and about 20 handloads ready to rock. The Olympic is terrible, and the 4' muzzle flash would easily give me away. Maybe the M1 Garand that the CMP is in the process of sending to me...
Carbine: Kel-Tec SU-16B and SKS. At this instant, I'd pick the SKS simply due to me having more ammo (about 3,000 rounds of 7.62x39, both Wolf and Yugo.). The SKS also has an AR-15 rear sight and is properly zeroed (no range around here is longer than 100 yards, so I don't know how well it'd handle past that). Ammo's already on stripper clips in one of those Chinese vests. I'm down to 30 rounds of .223 for the Kel-Tec, though I have a 1,000rd order coming in. Plenty of
standard capacity magazines and at Trijicon Reflex II sight (though I'd need to zero it, it's brand new).
Sidearm: Glock 26. My G19 is down due to a missing takedown latch, otherwise it'd be the preferred weapon.
Shotgun: Mossberg 500 in 12ga. I have about 200 rounds of 12ga 00 buck, 10-15 slugs, and 25 rounds of 7 1/2 birdshot. Useful for engine blocks and hard targets, as well as close-range work.
-----
As for strategy, that'd be the real kicker. Maybe some long-range potshots against officers, antennas, commo dishes, etc. .30-06 FMJ will likely cause some damage to aircraft engines, fuel tanks, etc. Even if it doesn't break 'em, it'll cause disturbation when fuel is leaking out. Some bombs and booby traps (I hate the term "IED") would also come in handy on roads and around bases.
Any guerilla movement would likely be seriously outgunned, if not outnumbered. Chances of resupply would be slim, as the US doesn't have nearly as many hidden arms caches as do Afghanistan or Iraq. Conservation of resources, weapons, ammo, and people would be key. Shots against key personnel and materiel would help to incapacitate and immobilize the enemy, as well as demoralize them. Remember in
Full Metal Jacket how one enemy sniper (hardly a "sniper" with an AK) held down a squad of marines for 20+ minutes, killed three, and caused them to expend thousands of rounds of ammunition?
Full-out combat would likely result in devastation of guerilla forces. The key would be taking out high-value equipment and personnel (with an emphasis on helicopters and officers). The enemy can always get a new private (trust me, I was one once) to man a .50 cal on a humvee. They can always promote someone to Sergeant to lead a squad. However, it's expensive and difficult to replace an officer skilled at leading and directing men, and helicopters would be worth their weight in gold. Even with tanks or armored vehicles, enemy visibility and firepower is limited when they're buttoned up -- sure, tanks and APCs have big guns, but if the enemy can't see (here's where paintballing the periscopes comes in handy
), they can't shoot...and they're also limited to what guns they have sticking out of their vehicles.
The best defense against vehicles would be to strategically place vehicles or rubble (there IS rubble, right?) in key areas. Think Stalingrad -- it was very difficult for vehicles, tanks, and so forth to maneuver, thus requiring that the infantry be used. Infantry are vulnerable, espescially if smoke from burning tires obscures the sky for helicopters and air support.
The primary efforts should be to confuse, disorganize, and demoralize the enemy. Shoot-and-scoot attacks (no more than 2-3 shots from any "sniper" position, preferably with the shooter and spotter relocating after every shot, if possible, leaving no trace) would be the key thing. Note how even with RPGs, full-auto weapons, and mortars the bad guys in Iraq are getting their collective posteriors handed to them? They have no strategy, and are focusing on the "grunts", rather than the support infrastrure, leaders, and so forth.
