10 replies to this topic

[nate483]

After being absent for three years, I thought I would come back to post my revision of the snapbow. I was largely influenced by Carbon's design but wanted to make my own additions. I am not sure whether the concept is completely original but I hope my designs can help contribute to the community. Here were my requirements of the new design:
-Stock integrated into body (I had some issues with the snapbow mounting the stock to the body tube)
-Plunger rod is contained (as on the original snapbow there were saftey issues)
-Grip smoothly integrated into main body
-Full rifle range (~150ft) while having good rate of fire
-Simple; easy to break down with as few screws as possible

I do not have a full write-up but I took some pictures if anyone is interested in replicating the design.


Without barrel and my red stefons

With clear PVC loader

Pump assembly

Stock assembly

Custom wooden grip- I spent a lot of time getting this sanded and sealed

Basic body and plunger except two things- PVC guides for pump and slots in plunger

Close up of slots- this took some trial and error to get right

If anyone has any questions or comments I will try to reply. Thanks!

[therealnerfjunkies]

Not trying to be an asshole or anything, but, NerfOmania has already made this. Take a look at his Pumpsnap 3.0. You do have some changes, though.

[andtheherois]

'therealnerfjunkies', on 13 Mar 2013 - 06:31 AM, said:

Not trying to be an asshole or anything, but, NerfOmania has already made this. Take a look at his Pumpsnap 3.0. You do have some changes, though.

Not to be an ass or anything, but there were others who made pumpsnaps before him, checking the homemades directory would show that.

As far as this goes, I like it's design better. The aluminum arms assure that the pump will never break and it breaks into two main body parts making it easy to assemble. The only thing I would change would be to use push-plate style priming instead of slotted cpvc.

[therealnerfjunkies]

'andtheherois', on 13 Mar 2013 - 06:39 AM, said:

Not to be an ass or anything, but there were others who made pumpsnaps before him, checking the homemades directory would show that.

Crap, you're right. I completely forgot about those. I remember now. I just like NoM's style the best. But, yeah, you're right.

[DartSlinger]

I like the way you used a small traveling bolt to prime the blaster. Since it's small, the slots in your CPVC plunger rod are thinner, thus making it stronger.

Where did you get the aluminum plate? McMaster-Carr?

Edited by DartSlinger, 13 March 2013 - 12:07 PM.

[nate483]

'DartSlinger', on 13 Mar 2013 - 3:49 PM, said:

I like the way you used a small traveling bolt to prime the blaster. Since it's small, the slots in your CPVC plunger rod are thinner, thus making it stronger.

Where did you get the aluminum plate? McMaster-Carr?

Well the original construction started 3 years ago but I believe the aluminum plate was picked up at Lowe's. And for the design, I could have gone with a push-plate mechanism like andtheherois mentioned but ultimately I decided to go with this design for the reason you stated- it is stronger and more durable while also using less parts.

[BiwinningPanda]

'andtheherois', on 13 Mar 2013 - 06:39 AM, said:

As far as this goes, I like it's design better. The aluminum arms assure that the pump will never break and it breaks into two main body parts making it easy to assemble.

I agree. The removal of thinwall PVC from this makes it far more durable. I had this problem with my Pumpsnap, as after one or two dry-fires my entire slide cracked. I will definitely try to replicate this next time I go to my workshop.

[DartSlinger]

I have a few questions.

Is your pump grip 1.5" PVC?

Is the aluminum 1/8" thick?

What type of PVC is the stock made out of?

Edited by DartSlinger, 13 March 2013 - 05:27 PM.

[nate483]

'therealnerfjunkies', on 13 Mar 2013 - 06:31 AM, said:

Not trying to be an asshole or anything, but, NerfOmania has already made this. Take a look at his Pumpsnap 3.0. You do have some changes, though.

Yes I realize the idea of a pump snap had been around for a while, but none of the designs completely satisfied me so I decided to make my own revision.

'DartSlinger', on 13 Mar 2013 - 10:26 PM, said:

I have a few questions.

Is your pump grip 1.5" PVC?

Is the aluminum 1/8" thick?

What type of PVC is the stock made out of?

The pump grip is 2" PVC and the aluminum is 1/8" thick and 3/4" wide. These two things are crucial to having it fit together- the pump must fit around the aluminum plates while the aluminum plate must fit though the 1" PVC guides on the side. As for the stock, it is made from 3/4" PVC.

[Tangerle]

I really like the whole set up for the actual pump action part its self especially the pvc that actually is connected to the plunger rod. I also like the grip, though I hate wood. is the forgrip (or pump how ever people prefer to say it) comfortable?

[BiwinningPanda]

In case anyone wanted to know, I found 1/8" thick and 1" tall bars of aluminum in the nuts+bolts section of Home Depot.