Mek Gunz

Each time you roll an unmodified hit roll of 6 for an attack with a ranged weapon by a model in this unit, that hit roll succeeds regardless of modifiers.

In addition, immediately make an additional hit roll against the same target using the same weapon. These additional hit rolls cannot themselves generate extra hit rolls. When firing a weapon with randomly determined characteristics (ie. Bubblechukka), any additional hit rolls use the same characteristics as the hit roll that generated the additional hit roll.  This ability does not affect weapons that automatically hit their target.

Units comprised entirely of GRETCHIN cannot benefit from any Clan Kultur.  In addition, Ork Stratagems can only be used on these units if the Stratagem explicitly states so (e.g. the 'Grot Shields' Stratagem)