1- Survival Revolver - (cant think of the name but it fires 2 calibres of pistol ammo (.22 and .22long and .357 I think ?) & 410 shotgun shells) and has a removable stock. Revolvers are low maintenance and rarely screw up, they are also easily modified. Failing that a good quality .357 revolver, maybe the Taurus Model 66 since it is light & holds 7 rounds instead of 6.
2- AK 47 - (not a cheap shitty chinese copy) just cos they wear well and dont need lots of maintenance & can take a beating.
3- Rambo 1st Blood Part II Knife - Sounds rediculous but this is the name of the knife. They list is as a bowie/survival knife & it has the hollow handle insode of which is a survival kit with fish hooks, matches and razor blades. Inside the aluminum end cap is a working compass.
4- Gladius - Plenty of companies make these, they are double edged, nice thick blade is hard to damage, well balanced and can be used effectively in tight spaces (IE: Urban environments).
5- Recurve bow or Crossbow - Hard to decide, I won both so Ideally I would take both. but I guess if it came to a picnh I would take the recurve, less maintenance & it can be fired more rapidly.