Board Thread:Questions and answers/@comment-31076655-20180513162530/@comment-29595756-20180516034957

If you are wanting a barrel than can attach the Dual Mode Light Beam, the best option would be the Recon or Retaliator barrel as it was designed for these. As Elliott said, it needs a lot of clearance behind it, so I'm not sure if there will be enough space even if you use the MK II barrel and the Dual Rail Barrel. If you are trying to find a "laser sight" that will fit, I think the Targeting Light Beam should do the trick, as long as you don't mind the green light. Otherwise, there is always the super tactical duct tape approach.