OP_Weapons_mod.zip is a release file of the Minecraft mod Op Weapons Mod, made for Minecraft 1.6.2. It was published on April 26, 2014 and is 0 MB in size. For the full description, screenshots and every other version, visit the Op Weapons Mod mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.