Buy a ton of matches (strike anywhere kind) and tennis balls, cut off the match heads stick them into the tennis balls to make makeshift grenades. Also, get lots of alcohol and make molotov cocktails. A simple .22 with an extended clip, a 12 gauge, Mp5 and two 9mm pistols. Also, some Ammonium nitrate, gas, lots of ammunition, wood to make fortifications, things to make a chain link fence, barbed and razor wire, shovels to dig a trench in between walls to make climbing difficult and lots of fresh food, and army rations. Also, some supersoakers, to make a homemade flamethrower and, lots of black powder for some other tricks.