The trouble with Pump Mags (as I see it)

[need4reebs]

Yes, I was thinking about the lever action application a while back, which would be easier with a latch and everything in the frame.

Pump mags weren't originally designed to remain pumps. If you have to go down the custom machining road to get one now, we should at least consider the possibilities.

its more of a "can this be done" or "is this something i can do"....tinkererererer type thing....as well as not wanting to go down that custom machining road!

what type of levers would be small enough as well as strong enough to use for this?

[BTAutoMag]

just THROWING this out there...


why cant we make a pnue-pump that when pumped, trips the trigger frames saftey off?

or make it fully pnue and only let the air to the ram after cocked?

or even an electronic pump handle that lets air through a noid

with that you could have a pump that with the flick of switch be pump OR semi!!!!!!!!!!!!!!!!


first ever

[need4reebs]

just THROWING this out there...


why cant we make a pnue-pump that when pumped, trips the trigger frames saftey off?

or make it fully pnue and only let the air to the ram after cocked?

or even an electronic pump handle that lets air through a noid

with that you could have a pump that with the flick of switch be pump OR semi!!!!!!!!!!!!!!!!


first ever

hells yeah...arent you a machinist? how much longer til you finish...haha?

[need4reebs]

just THROWING this out there...


why cant we make a pnue-pump that when pumped, trips the trigger frames saftey off?

or make it fully pnue and only let the air to the ram after cocked?

or even an electronic pump handle that lets air through a noid

with that you could have a pump that with the flick of switch be pump OR semi!!!!!!!!!!!!!!!!


first ever

both of my pump mags have pneumag frames..so they are Pneu-Pump Mags

[PBLife]

Patience guys, I will be doing these, no need to start a campaign.
I'm in the middle of a project "everyone" (All 3 of you, lol) wanted awhile back. I've just started looking into pump kits.

*Another bag of popcorn in the micro*

[need4reebs]

:rofl::rofl::rofl:

*Another bag of popcorn in the micro*

[BTAutoMag]

~crunch~

[splat15k]

just THROWING this out there...


why cant we make a pnue-pump that when pumped, trips the trigger frames saftey off?

or make it fully pnue and only let the air to the ram after cocked?

or even an electronic pump handle that lets air through a noid

with that you could have a pump that with the flick of switch be pump OR semi!!!!!!!!!!!!!!!!


first ever

Crap, get out of my head! I was working behind the scenes trying to devise a concept for a pneumatic pump w/ autotrigger...one that would allow the use of any rail and body completely unmodified.

[BTAutoMag]

~crunch~

[Patron God of Pirates]

Crap, get out of my head! I was working behind the scenes trying to devise a concept for a pneumatic pump w/ autotrigger...one that would allow the use of any rail and body completely unmodified.

That seems like the ultimate feet in over engineering (but I would still love to see it). Take a natural semi, make it a pump, give it a pneumatic auto trigger. I mean, why even be a pump. You may as well take the pump rod and hook it straight up to the sear.

[splat15k]

That seems like the ultimate feet in over engineering (but I would still love to see it). Take a natural semi, make it a pump, give it a pneumatic auto trigger. I mean, why even be a pump. You may as well take the pump rod and hook it straight up to the sear.

All pump mags aren't practical, but people still want them.

[captian pinky]

mq pumps aren't practical either its like taking a sniper pulling the fully working frame and internals out to spend easy $300 to do the same thing which end sup causing more headaches.

[GoatBoy]

So thinking about the "block sear return" design, here's what I think needs to be resolved. Either:

1. Pump arm needs to reliably disengage from the sear block so it can't simply be held back and the marker is semi-auto again.

or

2. Sear travel is blocked by the mechanical "or" of the pump arm AND the blocking plate that's left behind.

I.e. In order to fire, the pump rod needs to go back forward AND the plate has to have been reset.


I think #2 is more feasible.

I was also playing around with this idea for the blocking plate:




Actually, I think I figured it out.

[need4reebs]

So thinking about the "block sear return" design, here's what I think needs to be resolved. Either:

1. Pump arm needs to reliably disengage from the sear block so it can't simply be held back and the marker is semi-auto again.

or

2. Sear travel is blocked by the mechanical "or" of the pump arm AND the blocking plate that's left behind.

I.e. In order to fire, the pump rod needs to go back forward AND the plate has to have been reset.


I think #2 is more feasible.

I was also playing around with this idea for the blocking plate:




Actually, I think I figured it out.

[GoatBoy]

Sat down and drew up what I was thinking.

The two sliding plates are spring loaded; the back one wants to rotate forward, the front one wants to rotate backwards.

State 1: Back of sear has dropped into the back plate's channel, front plate is held forward by pump rod and the front of sear is free to drop into channel.



State 2: Gun is fired, back of sear raises up out of back plate's channel. When it does, the spring loaded plate moves forward and prevents the sear from dropping down again.



State 3a: Pump rod is actuated backwards, which pushes the back plate back.



State 3b: As soon as the back plate is back far enough, the sear drops into the channel, locking the back plate. Front plate disengages from the sear and rotates backwards, preventing the sear from being able to drop (i.e. safety).



Pump arm moving forward returns to State 1, where the sear is free to drop into the front channel again.


There are various details like the non-orthogonal shape of the sear, but I believe they can all be worked out.

The benefit is: you still get to use all your fruity artistic custom bodies without modding, and your level 10 without modding.

However, the drawback is it's a pretty rail intensive mod. All the magic happens inside the rail, and if you want to get down to the nitty gritty, I think the pump rod and the rotation pins for the plates are outside of the 1" width of the rail if you want a full 0.68" pump stroke. So this might not even be able to be retrofitted on any existing rails.

Of course, if you have a 3d printed rail, the rail mod is cake.