Step 9: Barrel Replacements Part 3: Replacing the Barrel
I will go over the two most common approaches to this:
Simple Replacement (Singled)
Performing a "simple barrel replacement," referred to on Nerf websites as a "singled" gun, is when the new barrel is simply glued in place of the old, stock one. The one drawback of singling a Nerf gun, however, is that it takes longer to load a stefan in the barrel than the coupler setup. If you plan on back-loading stefans, you will have to ram the stefan down to the back of the barrel. In a Nerf war, this is difficult to use, considering the fact that you must carry around a ramrod.
Coupler Setup (Couplered)
When you "coupler" your Nerf gun, it is when you glue a coupler in place of the stock barrel. A 1/2" CPVC coupler, for instance, can be glued in place of a barrel so that 1/2 CPVC barrels can be loaded into the coupler. This way, you can take out a barrel, load a dart into the back of the barrel, and put the barrel in the coupler. This makes for faster loading. A couplered Nerf "Big Bad Bow" can be seen in Pictures 1, 2, and 3.
Additionally, setups like that shown in Picture 4 can be used with couplers. This is a simple flip-around barrel, made from gluing two barrels together. I wrapped this flip-around barrel with electrical tape to make it look cleaner. The arrows on the barrels indicate where the barrel faces when it is inserted in the coupler. Pictures 4, 5, and 6 demonstrate the flip-around barrel.