Step 1: Step 1: What You Need
Phillips Head Screwdriver
Hot Glue Gun (or other glue)
Rotary Tool (Dremel or similar)
Black Spray Paint (Optional, but highly recommended)
Tape (any kind that you can get paint on and remove)
4 1/8 Inch Rivets
8 Size 5 or 6 Flat Washers (5 is preferred, but harder to find)
4 Single Hole Pipe Clamps
Velcro Strap (the kind that comes in a loop like tape)
Nerf Secret Strike AS-1
Step 2: Step 2: Remove the Casing
Step 3: Step 3: Grind Away the Webbing
BE VERY CAREFUL NOT TO GRIND INTO THE TOP OR BOTTOM PIPE! If you do, no matter how many times you pump the gun, it won't fire again. I have a picture of where I messed up the first time; please, learn from my mistakes! The important thing is to remove the majority of the webbing without accidentally grinding into the pipes, so don't sweat it if you didn't grind the webbing away perfectly! See the last picture to see what I mean.
Step 4: Step 4: Paint the Pipes (Optional)
In some of my pictures you'll notice I have tape around the front of the barrel, the top of the button, and the end of the pump; this is to keep paint off them when I spray paint it. Keeping the button and pump the original color was personal preference, but I HIGHLY recommend you keep the tip of the barrel orange. This is technically a gun, so keeping the tip orange is a way of showing it's a toy.
Step 5: Step 5: Prepare the Velcro Straps
Cut out a length of the Velcro strap about four and a half inches long.
Next, you need to put a small hole in the end for the strap assembly to be built around. Bend about half an inch over the end of one side of the strap (like in the picture) and then cut in the middle of the bend to make a hole. You want to make as small a hole as you can so the rivet fits in it snugly.
Step 6: Step 6: Construct the Straps
To make a single strap (again, you'll be making four), you need your Velcro strap, one pipe clamp, two washers, and a single rivet.
Put the Velcro strap over the top of the hole on the pipe clamp soft/fuzzy side down (see the picture to make sure you get this right).
Put a washer over the rivet, and then slip the end of the rivet through the hole and strap from the bottom (again, see the picture).
Put the second washer on the other side where the rivet pokes through the Velcro.
Step 7: Step 7: Rivet the Strap Assembly
That's everything you need to do to make one strap! Again, you'll need four of these, so repeat the past few steps until you have four. Remember to have the soft part of the Velcro strap facing down and to put the strap on the top of the pipe clamp's hole.
Once you've made four, move on to the next step!
Step 8: Step 8: Glue the Straps Onto the Nerf Gun
Start by putting a nice glob of glue inside the loop of the pipe clamp. Any kind of glue will work, but be very careful if you decide to use hot glue! The pipe clamp is made of metal, so if you use hot glue, the metal will get hot! I personally used hot glue and then handled the assembly with gloves, but it might be safer to use other strong kinds of glue.
Next, simply push the clamp over either the top or bottom pipe of the Nerf gun. You'll need two on both the top and bottom. Make sure that the top left and the bottom left (and top right and bottom right) straps are lined up so that the straps will overlap when you go to put the hidden gun on!
Step 9: Step 9: Complete!
Pump the forward pump several times to ready your hidden gun and press the button on the top when you are ready to fire. Make sure to bend your wrist away from the gun so the dart doesn't hit your hand.
I hope you have enjoyed this Instructable, and I hope this helps you with any Assassin- or Nerf War-related activities you participate in!