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02-24-2008, 05:56 PM
| #1 (permalink) | ||
| Post Whore  Join Date: May 2006 Location: Phoenix, AZ  | Mag pumps: how do they work?
I know that the bolt resetting on a pump mag is still the same as on a normal mag, and that the pump is simply to manually "charge" (or work the on/off) the valve. What I want to know is the internal workings with a pump mag firing cycle. Just what is actuated HOW in the firing cycle by WHAT?
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02-24-2008, 06:22 PM
| #2 (permalink) | |
| Thick  Join Date: Mar 2006 Location: Rocklin, CA   |
I recently was learnt this by ajnin. Basically there's a 'wave washer' that replaces the urethane washer between the bolt and dump chamber that prevents the bolt from fully re-setting. All cocking does is push the bolt back a little farther, compressing the wave washer and letting the sear latch it. When you pull the trigger, it thinks it's a standard Mag, except the bolt doesn't go fully back and re-set. It seems kinda backwards to do this, but people do.
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02-24-2008, 06:31 PM
| #3 (permalink) | |
| MCB Member  Join Date: Mar 2006   |
"Bolt Stick" Basicly just as Hurtcow said. You intentionally make the bolt not able to reset all the way. When you pump the gun your pushing the bolt back the last teeny tiny bit enabling the gun to fire again. Everthing else internal to the gun operates the same. It's very ***-backwards but is a fun gun to shoot. Here's a bit more info: Linky -MR
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02-25-2008, 04:17 AM
| #4 (permalink) |
| MCB Member Join Date: Sep 2006 |
i love telling people that i kill them with a broken gun 
__________________  JF Paintball & Airsoft Grass Valley, CA (530) 273-3582 Everything to Get You in the GAME! |
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02-25-2008, 11:42 AM
| #5 (permalink) | |
| YS-OFG Join Date: Oct 2007 Location: Bosnia |
I wonder, would it be possible to make a pump mag that is closed bolt, not blow forward? Maybe remove the front spring entirely, keep that wave spring behind the bolt like a return spring, and tweak the valve a little?
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02-25-2008, 11:56 AM
| #6 (permalink) | |
| Needs new knees  Join Date: Apr 2006 Location: St. Louis | Quote:
A mag is a dump chamber style marker. The bolt is an integral part of the system, thats what keeps the dump chamber shut before you shoot. And there really isnt a good reason to make it closed bolt, the whole closed vs open bolt controversy has been proven to be false, they both shoot the same. If you really want a pump mag closed bolt, go buy any nelson pump gun............ | |
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02-25-2008, 12:08 PM
| #7 (permalink) |
| Passing through rider  Join Date: Mar 2006 Location: Finleyville, PA |
That wave spring isnt that large... what you are suggesting is not possible.
__________________ Bryan "Azzy" Spiegel Riverside Renegade Paintball / C.C. S.V.S. Plankowner - LPPC#6 "It is my right to be uncommon—if I can. I seek opportunity—not security. I do not wish to be a kept citizen, humbled and dulled by having the state look after me.... ” - Dean Alfange |
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02-26-2008, 11:05 AM
| #8 (permalink) | |
| CHEERS!  Join Date: Mar 2006 Location: Northern California | Quote:
__________________ Dabbling in the recreational paintball arts since 1991. | |
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02-26-2008, 11:36 AM
| #9 (permalink) |
| Post Whore  Join Date: Aug 2006 Location: Southern Maine |
So the pump is not permentantly connected to the bolt? Just curious, as some pump tournaments specifically state that the pump is supposed to be directly connected to the bolt. I imagine this is to ban pump-assist snipers. nick
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02-26-2008, 11:38 AM
| #10 (permalink) |
| Purify with flame Join Date: Apr 2006 Location: On some dinky hill |
Imagine a typhoon with a pump kit with the semi still turned on, but LPR not set hot enough to cock the hammer, that, with exception of where the cycling is occurring, is a pump mag. with how fast pyres and ccms are these days it barely matters anymore.
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