Nerf Mods: A Beginner's Guide

Step 12 Spring Guns - Seal Improvment

Spring guns use an O-ring to create a seal against the plunger tube. This seal, hoever, is not perfectly airtight. Although it does not seem like much, improving the seal by the slightest bit can really make a difference in range. There are three common methods to this:

Method 1: Simply replace the stock O-ring with another O-ring that has a better seal. O-rings can be purchased at a hardware store. Make sure that your new O-ring is not too large, because you want to have a good seal while keeping the ability to have the plunger slide around comfortably in the plunger tube. (Picture 1)

Method 2: Add a second O-ring to the plunger head. This method creates a great seal because there are two seals in the plunger tube. (Picture 2)

Method 3: Add a thin layer of electrical tape where the O-ring originally was. Then, put the O-ring over that layer of electrical tape. This stretches out the O-ring to a slightly larger size. In this plunger (Nitefinder) you do not even have to tape all the way around the plunger head. The layer of tape must be thin enough to allow the plunger to slide through the plunger tube comfortably. (Picture 3)

Comments

[SaltyNerfer]

Hey, i want to mod my long shot. I already removed the ars, and im going to replace the spring and o ring. Should i do the barrel, too?

[geek27]

Well, doing a barrel replacement on the Longshot really isn't an easy thing. If you wanted to do a barrel replacement for your Longshot and keep the six-shot clip mechanism, you'd probably have to make a complicated breech system, like Forsaken_angel24's mod.  But, that's certainly not an easy modification...

Another, easier option would be to create a simpler breech system that would "single" the Longshot.  In other words, if you make this type of breech, you won't be able to use clips and you'll have to put a dart in manually between shots.  There are a couple of these, like this mod.

You could also just leave it like it is, with the stock breech setup.  Whatever you decide to do, good luck!

[SaltyNerfer]

Thanks for the help.

[puppetmaker77]

What kinds of O-rings do you usually use for these different methods for a Nite Finder? Like what size? The ones on HomeDepot.com seem to be categorized by some sort of number system.

[Arvex]

Probably varies by which Nerf blaster's plunger you have.