Sam Warrior said:
... a pistol with easy to get ammo ...
Smart Warrior!
Yes, that right there is why you want a 9mm, a .45 and a .22LR. Ammo for them is everywhere. It's also why you want the 12-ga shotgun even though the 20's lighter, easier to carry, easier to control and more comfortable in use. You're just that little bit more likely to find ammo in 12. If you're in a group (good idea too) you probably want weapons in multiple calibres correspondign to the most widely available ammo rather than all using 5.56mm to make supply simple, the way the army does it.
Speaking of 5.56mm, I'd want a rifle that fires that stuff and some time to zero it with that and learn where it puts .223 bullets, because a 5.56mm rifle can use that stuff too. I'd probably use the .22LR (or .22SSS works too) at shorter ranges where possible, though. I don't really think stray chunks of lead and copper pinging around the town at Mach 3 is a good idea even if most of the other people are already undead.
For "a" pistol, I choose the Browning Hi-Power and Colt M1911 .45 so I can use 9mm and .45ACP supplies, sound suppressors to protect my hearing so I can hear the b_____ds coming.
The projectile weapon that turns "anything" into a missile is eitehr a modified crossbow or a simple, old-fashioned slingshot. I'd need to practise for a while before I was any use with it but how soon are you likely to run out of rocks, coins, chunks of concrete, loose bolts, ... ?
Then it's melee time! I
have the crowbar and axe here, but I think I'd be looking for a spear or naginata or a way to make my own (garden centre up the road, salvaged old leaf spring, grinding wheel, bit of time, drill, couple of bolts, four washers, two nuts ...) because decomposing corpse is not really something you want to get on you. A long-handled mace would work, too, as long as you had room to swing it.
Also good to have: biker leathers, tent, roll mat, sleeping bag, torch, rechargeable batteries, solar recharger, two-way radios, wind-up AM/FM radio, utility knife, tool kit, water bottles, purifying drops, neutralising drops, rope, whistle, compass, maps, plenty of spare socks, rucksack, webbing, warm gear, binoculars (or a telescopic sight on one of your rifles), waterproof matches, flint and steel, tinder box, flare gun and flares, this MEAN branch saw I have ... and, thinking about it a little more, maybe my cousin's boat. An island's easier to clear and any mainland zombies that try to walk out to it on the seabed are going to get eaten, especially once the fish "stocks" have had time to take advantage of the sudden deaths of all the fishermen.
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Fictional? Hrm ... assuming I can get mana refills somehow, Wraithverge and Bloodscourge ought to do pretty well, a Halo:CE Scorpion, Warthog and/or Banshee would really help, a UNMC sniper from Halo:CE or one of the security team from original Half-life would be very handy to have along and the (WW2 version) Enemy Territory field op's binoculars not only fill the binoculars requirement above but also come with the ability to drop mortar rounds anywhere exposed to the sky within your line of sight.
Those L4D zombies that cluster around anything loud and/or flashing are drawn to car alarms, aren't they? Shoot out car windows in a distant car park until an alarm goes off, wait for them to crawl all over it and then drop a few rounds of 81mm frag on them ... or just one RP incendiary, although the game didn't provide them.
Oh, X-Com: Enemy Unknown laser rifles. Oh, yes. Them. They'll burn the wall off a warehouse at a hundred paces (or, presumably, being lasers, 2000 paces as long as your aim's steady enough) and they never run out of power.
..... or just the rifle from City Of Heroes. The one you get as a Blaster, Corruptor or Defender, that gives you Burst, Slug, Buckshot, Sniper Shot, Full Auto, M30 Grenade, Flamethrower and Ignite powers and never runs out of ammo, just takes a few seconds to recharge each power. How even an 8' amazon lugs a weapon like that around, I don't know, but it'd solve all kinds of zombie problems, wouldn't it?