Open bolt pump?

[ChoSanJuan]

Other than the Pump Ion from Ed Peterson and that weird purple Spump that was just posted, Are there others? Specifically, not homebrew/diy pumps?

[autococker04]

Mag pumps.

[Toestr]

Pump mags, maybe pump 98s?

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[ChoSanJuan]

OK, cool... Any production models that are off the beaten path?

[Ecapnation]

Splatmasters..... Kinda

[ford]

I wish someone would make a pump kit for Emeks.
Leave the internal workings of the valve/3-way alone, but build out a more complex trigger mechanism that relies on a pump stroke to reset the trigger.

[Jordan]

I wish someone would make a pump kit for Emeks.
Leave the internal workings of the valve/3-way alone, but build out a more complex trigger mechanism that relies on a pump stroke to reset the trigger.

Emeks don't rely on the trigger being reset to complete a cycle, unlike a mech Ion. It's an interesting idea but I don't see it being a functional one.

[Alexndl]

There was a post on the old MCB for a pump DP G3
The pump action was activating a valve was filling the dump chamber and the trigger was releasing the pressure keeping the bolt back.
On the DP G3, the dump chamber is connected to the regulated air output on those. From what I understand the passage between the HPR and the dump chamber was blocked and a valve was added to fill the chamber when pumped.

[djeclypse]

Pump mags, maybe pump 98s?

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MCS offers a pump kit for their 98 based magfed markers, the bolt/blizzard/vortex. Not sure about the Hurricane which is an X7 based marker. I'm sure it's not too hard to get the kit, 50ish ducats, and mod the 98. I have a blizzard and there is really only one screw hole difference at the front that I can tell, along with the lack of the right side hopper.

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[SignOfZeta]

From the factory…I don’t know of any, I can only think of downsides.

Splatmaster…opens as it fires, right? That’s the closest thing I can think of.

The basic idea of a open bolt pump…doesn’t that pressurize the hopper every time you fire it?

[Nish]

Was it Australia that AGD made the pump mags for?

[superman]

you are correct.

[Jonnydread]

I have an MCS Bolt(98) magfed pump, I think it’s technically open bolt? Im gonna use it today I can check

[Jonnydread]

It’s closed, the bolt fully pushed the paintball into the barrel when ready to fire

[Hp_lovecraft]

Splatmaster and GZ1000 are both open-bolt pumps. The breach is fully open when the gun is "ready to fire".

I guess all double-actions might count as "open bolt", but since the definition technically refers to the actions of automatics (semi, full, etc), we would really be splitting hairs with double-actions.

[Macdave06]

There was a post on the old MCB for a pump DP G3
The pump action was activating a valve was filling the dump chamber and the trigger was releasing the pressure keeping the bolt back.
On the DP G3, the dump chamber is connected to the regulated air output on those. From what I understand the passage between the HPR and the dump chamber was blocked and a valve was added to fill the chamber when pumped.

You are correct. Basically a spaghetti bundle of hoses. Theres also a check valve inline to the dump chamber to prevent it from losing pressure when the trigger valve releases the bolt. I also added a qev to the bolt port since then to allow it to vent faster. I was just going through this thing again now that I got a legal tank.

Planning to take it out to play in a couple weeks.

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