Hmm.... now im thinking of a "bolo gun" with a double barrel , anyone else?

It would be half as easy to build and way more fun!

Go read the "forum posting rules" . Eeeeesh....

Robthelad - I would suggest building a new gun for 5mm. Keep the one you have completed if it works. I've learned its better. Then you'll have two guns.

I recommend thinking about what you just asked. You are messing with 800 psi. and your having trouble with pipe fittings? You might reconsider your whole approach.

Hmm... something like this 3/4" bore-pumped balanced spool valve frozen grape launcher?

Please accept my apology , I was just joking about customers!
I do plan on trying out different strength magnets , so I'd be able to adjust the detent somewhat.
I'm building the barrel /magazine unit today , soon I'll have progress photos.

FIRST: Show me your "cannon" or "gun" device ,

SECOND: Make sure that "smaller hill" ain't sombody's house man.

THIRD: "Programs" and "spreadsheets" do not calculate how awesome 1400 meters with an 800 meter drop is.

""IIRC the issue was with the detent, not the bend. In your case, you wouldn't need one."" WHAT? why I no use detent !? The magnet detent is very important to control ball drop.I suppose it also adds a slight resistance to the ball in breech , just like a mecanical detent would . Of course, that onl...

I've been too busy with "life" to finish my hammer mechanism , but I made this update incase someone is interested. Re-worked pump and chamber attachment (now brass) and moved pilot vent button to rear.A medium rubber band on the proto-type hammer (photo above somewhere) was enough force to pop the ...

I hope no one minds that I point out the cone appeared to be friction fit to the nail shaft . This dart will fail even at lung pressure from a blowgun. How is the o.p. keeping the cones on ?

I think a few of you doubt the serious nature and impact of such a unit of molecule acceleration ! (wink ) Don't make me make a proof video...

I'm starting to think you've "been there, done that" with everything to do with pressure and projectiles. :shock: I should have started this addiction years ago! No that's not the project , the barrel and mag were actually laying side by side and I thought the topic was more recent . This may be my ...

So this is my "re-rendering " of your idea. Standard coaxial but the "barrel " actually holds your barrel/mag. combo. I do have soft copper for the mag. tube so the 90* bend at the breech can be fairly uniform. ( I didn't draw in the epoxy plug at the sealing face ,just assume it's loaded with epoxy...

hehe - wasn't meaning to get into personal issues! I'm thinking of a project of yours that had a barrel and tube mag. straight parallel to each other. I think I read you had some issues with feeding ammo around the "BEND" at the barrel's breech , the ammo had to turn 180 degrees.

Thanks , I'll try that configuration just to say I made burst fire pistol! The novelty of it may be gone before it gets built though, I know any bbmg is weaker than a single shot. Still a build-challenge to myself and reason to spray bb's as if they're free. ps. - jack , was the issue(s) with the be...