SpudFiles

Started to work on the main piece, it's 2 1/4" x 1" aluminium channel, a bit rough in places but should work ok.

Many holes to drill Was a bit messy But turned out nice

Are you trying to make ammunition?

lol no, just drilling holes for the sake of drilling holes.

Should look something like this

Oh yeah! now it makes sense jajajaja

Fitted a few parts together for a preview

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It looks long. Is it repetition?

Just a single shot, the barrel tube is 900mm long at the moment, that's how it came, I will cut it down to about 750mm.

To work to finish the weapon. One more for your collection of pneumatic weapons.
I do not have anything in that caliber, 4.5 mm. I'm thinking of buying a shotgun with rifling to make a small hybrid that is what I design. The only thing that looks like is the 3/16 "steel bb I use on a small combustion rifle.They are fast.

A couple of hours work with the hand tools

Got the grip mounted to the main body and the micro switch trigger which also has some adjustment for reach

Bipod and scope mount

I'm getting an Eraser rail gun vibe, I like it!

Are you aiming for high velocities?

Noooo, I'm aiming at a target and hope something comes out the end of the barrel when I pull the trigger, everything else is a bonus.

A bit more done.

O ring seal on the breech tube. Adjustable stop on the bolt handle to put pressure on the rear O ring. Barrel cut down to 750mm, attached and locked in position, breech hole cut. Got some ammo, some domed pellets and BB's

That's a push to connect fitting at the barrel attachment if I'm not mistaken, which means if you press the blue plastic ring the barrel will come off? Even if the barrel is locked somewhere else that's not a perfect spot for the o-ring to seal against but probably won't leak much.