NIX-122 recently asked me to modify his Strongarm, and I decided to use that for my first entry in the contest. Originally posted here.

Tools: No. 1-size screwdriver <a href="http://3.bp.blogspot...0425151336.jpg" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;">

Also, something long, thin, and sturdy.
(I used an HFT screwdriver)
[No Picture]
Harbor Freight & Supply Rotary Tool Set

Swiss Army Knife

Magnet

Materials Strongarm (N-Strike Elite)

Sandpaper Teflon tape (plumbing tape)
Random spring that'll nest around the plunger rod
Steps:
Get a Nerf N-Strike Elite Strongarm. (Pro tip: Use magnet for faster acquisition.)

Unscrew the three screws in the priming slide and remove it. Unlike the Maverick, there is no tricky metal pin connecting the two halves of the slide. Instead, the bottom/right half is screwed onto the slide-return spring. Leave that be for now.



Now, unscrew the rest of the springs, but leave them in the shell. Time to butterfly the blaster.

The cylinder is presenting a problem. Eject it and the problem will be resolved.

The blaster should separate nicely into two parts: one
with the guts, and one with the cylinder.

The cylinder should easily come out of the shell.

The gray part at the front should easily slide off.

Now, let's make this bad boy able to handle all micro-size darts and stefans.

You will want to use this grinding head if you are using an HFT rotary tool set. (The one that's sticking out.) If you're rich and have an actual Dremel, you figure it out.

Load your rotary tool with the bit.

Fire it up. Whoops!

Make sure the cord is plugged in.

Grind away where I have marked.

It should look something like this.

Switch over to a sanding drum.


Grind out at the inside of the chamber.

Do this until an elite/streamline dart'll fit inside. Repeat for the other five chambers.

Now, on to the other part of the blaster. Unscrew this screw, the only screw holding the internals inside.

The internals pop out easy.

Pull the plunger out.

Pull the O-ring off.

Apply ~4 layers of Teflon (plumbing) tape.

Put the O-ring back on.
(No picture, but do you really need one for this step?)
Next, wind your spare spring around the plunger.

Grab your long skinny tool and use it to ream the ar out.



And, crunch! You may need to repeat if you have a stubborn air restrictor.

Put the plunger back in.

Put the internals back into the shell.

Put the screw back in.

Put the gun back together.

Viola! Rear loading Strongarm!

Bonus: Can feed streamlines and stefans!
Warning: this mod makes it extra powerful, so exercise caution when using it.
I did not do any scientific measurements, but it does shoot much harder, and probably much further with good darts.
(The sharpieing was done by my friend.)
The only aesthetic change is the fact that it is rear-loading.