its a laser that aligns with the bore and projects a dot at 25-50 yards (depending on how your doing your sight in) and you adjust your scope to zero on the dot. So if it was me, I would be zero'd at 25 yards and that would be 1" high at 100 yards.
Well, we had a Challenger I tank during training in Canada, do a similar thing when the previous round got jammed in the barrel, unbeknown to the crew. banana splits, man!
It is not the technique that wins a fight, but the more furious mind - Kodiak WOF
You are stuck on stupid. I'm not going to answer that question! - Gen Honore, New Orleans Sep 05
Well either way would love to see pic's of that event. I just see a 120MM shot blowing back into the gun as well, and well that could be a bad day for the crew. but either way, sick lol