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I've been looking at this for 30 minutes expecting to see james bond
That's very interesting; it seems to have a progressive twist rate. I assume that this is from a large bore armament of some kind? I believe that gain twist is sometimes (usually?) used on artillery. (See: https://www.youtube.com/watch?v=KI-_CtmOzFs)
Rifiling can't have too tight of a twist or it will cause overheating, jams, and other negative effects on the rounds. The same twist is (at slightly different profiles) used on most modern firearms and artillery.
dont look in the barrel it could shoot you in the eye
Well, not when you look into the breech.
I see rats in a sewer.
Rocks and pebbles. Not entirely sure how they got there.
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