Hi guys
I wouldn’t drill any holes into the barrel either!
This is my version of a mounting bracket.
It is dead easy job (20 min max) to make a bracket for a rail-gun, all you need is:
25 x 3 - 300mm long aluminium strip (Capral)
2 - 1/2" - 20TPI - SS bolts - 30mm long
1/2" SS flat o/sized washer
1/2" SS spring washer
contact glue (all from Bunnings)
25 x 2 - 70mm rubber strip
1/2" - 20TPI tap (M5 or M6 would do too, but 1’2” – 20 TPI is a standardised camera mounting thread at the bottom your camera so I’ve used same bolts for simplicity, you actually don’t need the tap if you fix the gun mounting bolt with a nut, but then you need two spanners to fit and adjust camera to the gun)
hack saw
wise
drill & bits
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bracket assembly
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parts
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on a barrel up, ready
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on a barrel down for loading
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rotated down with camera
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up with camera
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LCD muzzle view
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earlier version in SS, for pipe gun or rail gun without rail all the to the mech, rubber strip missing (very important)
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SS bracket - top
Don't have any drawings of it, got it done on fly in my garden shed fitting it directly to the gun barrel.
Marek