Semi-auto .402 cal work in progress

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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JDP12
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Well just tested it with a CO2 cartridge and the original piston... worked fine, no leaks. So all thats left is to make a body for this, and eventually a magazine.
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jackssmirkingrevenge
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Told you :) a few people laughed a few people cried most people were silent i remembered the line from the hindu scripture
hectmarr wrote:You have to make many weapons, because this field is long and short life
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JDP12
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haha. indeed you did o wise JSR.

cuz i can't resist the urge of shooting something, took a few shots while it was at max power, even though it was a 3/8" bearing, so there was considerable blow by. At 10 feet or so, managed to penetrate a 1/4" into a 1" particle board. So hopefully when I make an airtight projectile, power will be better.
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JDP12
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Started making actual projectiles today..

I'm sorry for the terrible quality of the picture I couldn't get it to focus on it to save my life.

It's pretty basic, just a short section of the barrel is lubed up, the ball bearing is dropped in and epoxy is poured into it.

Haven't test fired it yet, but it should give a good airtight seal and will be pretty easy to feed via magazine eventually.
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jackssmirkingrevenge
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Looks good :) I'd be concerned about the BB breaking off on firing though if you haven't roughened the adhering surface.
hectmarr wrote:You have to make many weapons, because this field is long and short life
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JDP12
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it just broke off before even firing... so I will have to roughen the adhering surface of the Ball bearing for the next one.
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inonickname
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I'd really rough it up..drill a hole if you can.. bastard cut file/grinder as well
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Zeus
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Make sure there's no grease or lube on it too. Hit it with a blow torch to burn it off.
/sarcasm, /hyperbole
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jackssmirkingrevenge
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... or just avoid using BBs altogether ;)

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hectmarr wrote:You have to make many weapons, because this field is long and short life
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