Customer service was great for me recently. I just bought an Arc6 with guarded sleeve and what arrived was an Arc6 with NGS. It also had a few nicks on the head. I contacted them and sent them pics. Within a few days I received the correct light in the mail with a tritium vial installed and a pre-paid return envelope for the other.
SUGGESTION: I think the first light may have been damaged in transit because when both of the lights arrived, the battery was not in it's slot in the box. I think that if the battery gets loose, it may roll around and touch the light.
COMMENT ON LIGHT: It is one of my favorite lights, and I have many. I have a number of custom, McGizmos of all types, etc and this light is up there as one of my favorites. Useful light and nice tint.
Thanks,
shane