GMOD DarkRP m9k Wepons create LUA Error when fired.

Hello could someone help me please i have installed m9k weapons to my Dark RP server but when i fire them i get this error.

[ERROR] gamemodes/darkrp/entities/weapons/bobs_gun_base/shared.lua:382: attempt to index a nil value

  1. ShootBullet - gamemodes/darkrp/entities/weapons/bobs_gun_base/shared.lua:382
  2. ShootBulletInformation - gamemodes/darkrp/entities/weapons/bobs_gun_base/shared.lua:306
    3. unknown - gamemodes/darkrp/entities/weapons/bobs_gun_base/shared.lua:224

This might be an addon conflicting but I do not know.