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Different Take On A Doubled Up Nf


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#1 OberonFox

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Posted 27 April 2008 - 01:05 PM

After getting my feet wet with with a few normal mods (NF, Mav) and my Recon Mod I wanted to take a stab at something similar to the NF Rifle, but in reverse. So I added the second plunger tube to the back end of the gun, not the front. I attempted a breech mod for it as well, which technically worked but was killing my ranges (more work to figure that out) so it's just a standard singled springer for now.

Here's the pics.




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Internals with all the standard AR removals and such. Plunger tubes epoxied together and plunger nested and fitted together. Eventually I drilled and inserted two very small screws into the overlap area for the plunger so that it could handle the pull stress of the extra spring. To allow for the trigger to work I just cut down the rear trigger plate and attached it to the forward one with a bit of metal bracket, works beautifully.


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External shot. Yes, those are Popsicle sticks used for exterior reinforcement. They fit nicely into the dremeled out NERF medallions and helped hold it together for later epoxy putty reinforcement. I was worried that since most of the draw stress would be on the rear portion of the gun, it might rip off the back end. That's a little micro Maglite up front to replace the craptastic normal NF light. Just for shits and giggles.


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After making sure the proof of concept worked, I cut down and replaced the barrel end with a crayola marker breech mod. As stated it cut range, so I reshaped it to just be a nice bed for the dart. Also shown is the PVC barrel extension and an exterior barrel shroud for cosmetic purposes.


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Put together with full draw shown. Was a difficult process with lots of gluing and regluing to plug up air leaks and reinforcing. I stupidly epoxied the plunger completely together for reinforcement and had to cut it up to remove and alter springs. The pull ring on the back is actually only attached with a long screw so i can take it on and off to change springs if I need too. Right now it's got a handyman spring up front and a standard NF spring behind it. Two beefy springs wouldn't compress enough to get the plunger to latch on the trigger.

With the two springs and the barrel it gets pretty nice ranges (averaged 85' after 10 shots.) Nothing Effeminate, but this was more an exercise in design and boredom than an attempt to make an insanely awesome gun. Still I like the overall shape of the gun and with some cosmetics and a paint job will look pretty nice. I'll update the thread with pics when I get done with the paint. Enjoy!
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#2 Bomberman

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Posted 27 April 2008 - 01:13 PM

I like it. A lot. This is my favorite of this type of mod. Very clean, but I would have keot the second handle in the back. It looks a bit awkward, but a good mod nevertheless. You know, I have never done an NF spring replacement, but I think you could get more range if you use an AR-15 recoil spring. I am not sure that it would work, but if it would, try it. They are super strong.
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QUOTE(silentsnipe) View Post

It's not like that. I put lube on it and its the same. Its just stuck. And when I cock it back it goes farther back then usual. Also I push as hard as I can and it wont go back in. I've tried the methods and they wont work. Also pics are up.

#3 Nonsense Man

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Posted 27 April 2008 - 01:21 PM

I really like the rifle. I might go and buy another NF so I can make this.
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QUOTE(1lastnerfgun @ Apr 19 2008, 08:39 AM) View Post

40 shots for 40 cocks


#4 Dayko

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Posted 27 April 2008 - 01:22 PM

Cool. It reminds me of a Star Wars blaster, in a weird kind of way.
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#5 pustulio

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Posted 27 April 2008 - 01:32 PM

Nice mod, man.
Quote from mysefansdontflystraight
That thing looks like a do-it yourself abortion kit from the 1960s. I bet you hook it up to an air-tank.

#6 g-force

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Posted 27 April 2008 - 01:50 PM

Buh da buh ba buh im lovin' it.

Edited by g-force, 27 April 2008 - 01:51 PM.

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QUOTE(Carbon @ Jul 28 2008, 03:25 AM) View Post

My god, you actually built it. To that, all I can say is, "bravo".

Chubbs

#7 Maeric

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Posted 27 April 2008 - 01:57 PM

You shouldn't have any problem with it pulling itself appart, except when you cock it, because, when cocked, the force is on the wall right infront of the catch, and the plunger head.
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#8 Silencer

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Posted 27 April 2008 - 02:06 PM

Very nice. Good clear and easy to read write-up. Good job.
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#9 OberonFox

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Posted 27 April 2008 - 04:01 PM

Thanks for the comments guys.

@Bomberman It's actually not awkward at all and fits quite nicely in my hand.

Posted Image

I would probably try a single longer ar-15 spring, but since I couldn't get two Handyman springs to compress far enough to catch on the trigger, I doubt the AR-15 one could either. That and I had to make a custom recess on the plunger and the added stress would probably eventually strip the plastic and render it broken.

@Dayko Making it look kinda like a Sci-Fi blaster was one of the reasons I wanted to put the extra tube on the back instead of the front. And I'm a massive Star Wars geek so you're comment comes as high praise. :]
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#10 Dr Moose

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Posted 27 April 2008 - 04:38 PM

I'm lovin' the popsicle sticks.

That looks very comfortable. Nice mod.
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QUOTE(Forsaken_angel24 @ Apr 29 2008, 01:24 AM) View Post

QUOTE(Kid Flash @ Apr 27 2008, 06:11 PM) View Post

What is the best way to go at removing a stump without any power tools? Thanks ahead of time!

Be a man! Use your hands!

#11 OberonFox

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Posted 27 April 2008 - 05:13 PM

I'm lovin' the popsicle sticks.

That looks very comfortable. Nice mod.


Heh, I'm limited in my tools so I can't machine parts to fit my needs so I tend to get inspiration from things around the house. Craft stores have a lot of good parts some times. And yeah, it is pretty comfortable to fire.
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#12 Green-Buckshot

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Posted 27 April 2008 - 05:49 PM

That is awesome. The only way to improve that design is with Bondo.
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QUOTE(A side of nerf @ May 18 2008, 12:33 PM) View Post

Also, could you post some more revealing pictures?

#13 ChiliPepperFender

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Posted 27 April 2008 - 07:16 PM

I like it, nice job. How did you keep the two plunger tubes straight when you epoxied them together?
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#14 OberonFox

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Posted 27 April 2008 - 07:30 PM

I like it, nice job. How did you keep the two plunger tubes straight when you epoxied them together?


Right behind the plunger head is a recess in the plastic about an inch or so long. I shaved the back end of the front plunger tube to nest right inside of the recess on the back plunger tube. Keeps it nice and straight. For added reinforcement I actually dremeled out two small holes through the sides (one of each side) and screwed in two tiny screws in addition to the epoxy. It's solid as a rock. You can see one of the screws in the last picture with the plunger pulled back.
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#15 Galaxy613

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Posted 27 April 2008 - 08:33 PM

Very nice mod! If I had more balls and a dremel I would try this. Would Plumber's Goop work as well as Epoxy?
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#16 OberonFox

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Posted 28 April 2008 - 08:42 AM

Very nice mod! If I had more balls and a dremel I would try this. Would Plumber's Goop work as well as Epoxy?


I actually used Goop at first to seal the two plunger tubes together. Total disaster. Takes up to 24 hours to cure, tends to drift unless you have it viced together and all over just isn't that great. Any surface that will receive stress from air pressure, mechanical pressure, whatever will tend to break the seal and tear itself apart. It just doesn't bond well to the type of plastic that Nerf uses. So the short answer is no. I'm not a fan of Plumbers Goop. You're mileage may vary.
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#17 Bomberman

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Posted 28 April 2008 - 12:36 PM

That is awesome. The only way to improve that design is with Bondo.

Don't use bondo. E-Putty works better. And it is better if you want to paint it, also. And OberonFox, I did'nt think ab out the catch, so your right. But another NF rifle topic posted just after yours, used a screen-door closer spring. I can't remember if the guy used PVC for a plunger chamber, or the original NF one. But I think he used the NF one. He's getting 100 feet.

Edited by Bomberman, 28 April 2008 - 12:36 PM.

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QUOTE(silentsnipe) View Post

It's not like that. I put lube on it and its the same. Its just stuck. And when I cock it back it goes farther back then usual. Also I push as hard as I can and it wont go back in. I've tried the methods and they wont work. Also pics are up.

#18 sputnik

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Posted 28 April 2008 - 12:43 PM

While on the topic of springs, how does one go about cutting a spring to size?
I have had no luck doing so...
damn cordless dremel.
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#19 OberonFox

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Posted 28 April 2008 - 01:11 PM

While on the topic of springs, how does one go about cutting a spring to size?
I have had no luck doing so...
damn cordless dremel.


I use a cordless dremel just fine. You just have to get the appropriate cutting disk. They make one specifically for cutting metal.
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#20 sputnik

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Posted 28 April 2008 - 01:22 PM

They make one specifically for cutting metal.

Ah. Thanks.
Diamond I assume?
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#21 Dayko

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Posted 28 April 2008 - 06:38 PM

@Dayko Making it look kinda like a Sci-Fi blaster was one of the reasons I wanted to put the extra tube on the back instead of the front. And I'm a massive Star Wars geek so you're comment comes as high praise. :]


I too am a Star Wars geek. Now all you need to do is a paint job. May I suggest a Star Wars theme :( ?
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#22 OberonFox

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Posted 28 April 2008 - 09:43 PM

They make one specifically for cutting metal.

Ah. Thanks.
Diamond I assume?


I think so. They come stacked in a little plastic tube for like $10. I haven't even stopped using the first one yet, and it's great for cutting through about anything: including Nerf plastic.



@Dayko Making it look kinda like a Sci-Fi blaster was one of the reasons I wanted to put the extra tube on the back instead of the front. And I'm a massive Star Wars geek so you're comment comes as high praise. :]


I too am a Star Wars geek. Now all you need to do is a paint job. May I suggest a Star Wars theme :D ?



Workin' on it :o
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#23 Dayko

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Posted 29 April 2008 - 12:04 AM

They make one specifically for cutting metal.

Ah. Thanks.
Diamond I assume?


I think so. They come stacked in a little plastic tube for like $10. I haven't even stopped using the first one yet, and it's great for cutting through about anything: including Nerf plastic.



@Dayko Making it look kinda like a Sci-Fi blaster was one of the reasons I wanted to put the extra tube on the back instead of the front. And I'm a massive Star Wars geek so you're comment comes as high praise. :]


I too am a Star Wars geek. Now all you need to do is a paint job. May I suggest a Star Wars theme :P ?



Workin' on it B)


Can't wait to see it.
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#24 analogkid

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Posted 29 April 2008 - 10:02 PM

But another NF rifle topic posted just after yours, used a screen-door closer spring. I can't remember if the guy used PVC for a plunger chamber, or the original NF one. But I think he used the NF one. He's getting 100 feet.

Actually, mine was first :D . Anyway, no, the chamber is 1" thinwall PVC, and the screen door spring doesn't fit in the stock chamber.
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#25 Green-Buckshot

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Posted 29 April 2008 - 10:54 PM

I couldn't figure it out until now. That gun reminds me of those sci-fi aliens with enormous extensions to the backs of their heads! SWEET!

PAINTJOB!
PAINTJOB!
PAINTJOB!

Cool ass mod, my man.
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QUOTE(A side of nerf @ May 18 2008, 12:33 PM) View Post

Also, could you post some more revealing pictures?


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