Resin BlasTech E-11 Blaster By Derek Erdmann

Getting Started

What good is a Stormtrooper without his blaster?

The BlasTech E-11 is one of the most well-known props from the Star Wars universe. Based on the [Sterling submachine gun][sterling], the E-11 is iconic as the Stormtroopers’ primary weapon throughout the original trilogy. While finding original demilitarized Sterlings can be hard these days, great-looking replicas can be built from PVC and metal pipes, toy blasters, or resin kits. [sterling]:

The 501st Legion [does not require blasters][weapons] in their costume requirements, but who would take an unarmed Stormtrooper seriously? Blasters are also required for the higher-level certifications in the [First Imperial Stormtrooper Detachment][fisd] (FISD). The members of the FISD forums have already built amazing replicas and thankfully have put together incredible tutorials and suggestions for creating your own screen-accurate props and armor, and have been my greatest resources and guide on this project. [weapons]: [fisd]:

My build is starting with a resin kit from [Doopydoo’s Collectibles][doopydoos]. The kit isn’t perfect or complete, however, so there’s a bit of extra work involved in modifying the kit to look more screen-accurate. Here’s what comes in the kit: [doopydoos]:

![All resin parts in the Doopydoo’s kit][parts] [parts]: /images/blaster/parts.jpg

Out of the box, the resin parts feel slick and powdery. Most resin makers use a release agent to help free the cast parts from the mold, and unless it’s washed off before shipping, is still present on the parts when they arrive. I washed all the parts in warm, soapy water, scrubbing detailed areas with a toothbrush, then letting them air dry.

Starting the build

I started with drilling out the holes on the bottom of the blaster barrel. These are covered by the folding stock when the blaster is assembled, but they’re just visible enough that I want it to look right.

This was a bit trickier than I expected, since there’s a tiny bump in the center of each of the spots to be drilled out. I ended up drilling a smaller hole to get started in each one, then finished them out with a 7/16” bit to bring them to the full width.

Filled-in holes on the bottom of the barrel Pilot holes Drilled holes

The foremost hole is actually 1/2” instead of 7/16”, and has an extra notch for the folding stock to lock into on the actual Sterling.

![Large drilled hole on front of blaster][barreldrillfront] [barreldrillfront]: /images/blaster/barrel-drill-front.jpg

The folding stock has a bunch of these holes too, and I want to be able to insert a wooden dowel to simulate that brace on a real folding stock. I drilled out a couple holes, but quickly got ahead of myself and drilled with too much force, too quickly:

![Stock broken into two pieces][stockbroken] [stockbroken]: /images/blaster/stock-broken.jpg

So that’s going to need to be glued back together. On the upside, I have more room to get the Dremel into the stock to grind out the other bits, and adding the dowel should give enough structure to keep it together when I’m finished. I ground out the parts of the stock that would have the dowel running through it:

![Stock piece with inside ground away][stockgrind1] ![Stock piece with inside ground away][stockgrind2] [stockgrind1]: /images/blaster/stock-grind1.jpg [stockgrind2]: /images/blaster/stock-grind2.jpg

When I realized that the drilling and grinding is a little loud for a weeknight, I decided to put the project away till the weekend.

Resin Dust Everywhere

Aside from the parts of the folding stock that I wanted to hollow, many of the parts in the kit had extra bits of resin attached that left over from the molding process. Time to use the Dremel again!

To reduce the amount of dust that ended up across the room, I set up the vacuum cleaner next to my work area to suck away the dust as it was generated. It wasn’t quite as effective as I’d hoped, but it helped a little.

The trigger was one of the pieces that had extra resin, with about 1/16” to the side of the trigger, which was enough to keep the trigger from properly fitting into its place in the grip. This might have been easier with a sander instead of the Dremel, but in the end the piece was slimmed down pretty well:

Ground trigger piece

While getting to that point, the tiny trigger piece slipped while I was grinding and ended up in the last place I wanted it:

Trigger piece in vacuum


But eventually the piece was finished and fit snugly inside the handle:

Trigger piece in handle

The guard pieces that go by the ejection port and front vent hole had some extra material too. Those were cleaned up, but will need a little bit of patching to clean up air bubbles from the molding process.

Vent covers with extra material removed

The D-ring holder that goes on the back of the blaster had a post through the middle. Since I’m going to replace the D-ring that came with the kit, it needed to be ground out:

D-ring holder


The next major bit of work was grinding down the hex bolts on the front of the blaster. The original barrel had shapeless blob of resin where there should have been 1/4”-20 hex bolts, so I ground out those spots as well so I can add real bolts.

![Front of barrel with resin bolts ground away][barrel-front-drilled] [barrel-front-drilled]: /images/blaster/barrel-front-drilled.jpg

My preferred way of placing the new bolts would be to drill out holes for them, thread the holes, and screw them in directly, but unfortunately there isn’t quite enough material on the barrel for this to work well. I did manage to get one of the bolts to fit this way, but the hole wasn’t quite straight enough and the bolt ended up crooked. In the end, I’ll need to grind out the holes and glue the bolts in. Here’s what they’ll look like when they’re finally in place:

Front of barrel with bolts added

I used fine files to clean up some of the rough spots on the blaster - seams, bumps, and muddy-looking sections of the parts.

The bottom of the handle had another hex bolt molded into the part, so I drilled that out and added a real one just for detail’s sake. To make room for the head of the bolt, I used a 7/16” bit for 1/4” or so, then used a smaller one for adding the actual bolt. This bolt is the same size as the ones on the front of the blaster.

Bolt on the bottom of the grip

Safety Switch

A movable safety switch should be a nice detail on the finished blaster, but the space where the switch goes is a bit more constrained than I really want it to be since it’s so close to the handle. I won’t be able to screw the piece on after the blaster’s painted. The best solution I could think of was setting a small machine screw through the handle, then embedding a nut in the switch. When the pieces are painted, I’ll be able to screw the nut on and glue on the switch, which should be enough to leave let the switch move freely.

Drilling the hole means cutting out some of the grip texturing:

![Safety screw hole][grip-safety-hole1] ![Safety screw hole through grip texture][grip-safety-hole2] [grip-safety-hole1]: /images/blaster/grip-safety-hole1.jpg [grip-safety-hole2]: /images/blaster/grip-safety-hole2.jpg

But when the nut is set in the safety switch and attached, everything works:

Safety switch Safety test assembly


I want my trigger to move too. I’ve seen a few builds that have a pen spring behind the trigger to add motion, but setting the spring in the handle seemed like a pain. Instead, I realized I had some magnets lying around:


These magnets have a 1/4” diameter and are 1/16” tall, and fit in the trigger slot perfectly. To make sure this would work, I drilled a hole for one magnet into the trigger slot, then taped another to the trigger so that the magnets’ opposite poles were facing each other:

Testing magnets

And it worked! The magnets repel each other enough for the trigger to pop back quickly, and the trigger action feels surprisingly smooth. With some confidence in the final result, I drilled a hole and glued one magnet into the back of the trigger. It is crooked, but won’t be visible on the final blaster.

Trigger magnet

The trigger itself was fastened to the handle using a short machine screw. The holes will be filled in later. With that, I secured the handle to the barrel using E6000 glue and some wood screws - one directly behind the magnet that sits in the trigger, the other pointing straight up.

Grip attached to barrel

More Resin Dust

The big targets for this round of work were the folding stock and the magazine housing. Finishing the folding stock was relatively simple, and I removed the entire rod so that a 1/2” dowel can fit through the entire length.

I also worked on the front sight, grinding out some of the extra resin on the sides, and fitting a guide in the center. While not the most accurate result, I found a small flat head screwdriver that fits nicely in the sight piece.

Resin sight piece Screwdriver in sight Screwdriver cut in sight

The extra space in the center will be filled later.

The most interesting bit of work was the magazine housing. First, I replaced the resin set screw with a real one.

Screw in magazine housing

FISD member gazmosis makes resin magazines that look a thousand times better than the one that comes from the Doopydoo’s kit, but I need to make a few modifications to make it fit.

Replacement magazine

The kit includes a much smaller magazine, so the sides of the mag housing are very thick. To get the new magazine to fit, I either needed to make it shorter and only remove a little material from the housing, or keep the mag intact and hollow the housing out to make room. I’d like the mag to actually look like it was inserted into the blaster, so I decided to use a technique from another FISD member that allows me to move the housing while keeping the Dremel in place. This way I can get the control that I need to make the sides very thin. Here’s my setup:

Mag housing setup

The vacuum removes some of the resin bits while the Dremel stays in place. I adjusted the number of cards in the deck to control the height of the cutting bit. It took longer than I expected, but eventually I got the magazine to fit.

Hollowed mag housing The new mag fits

I attached the mag housing to the barrel using wood screws:

Mag housing attached

More progress! I like that my “loose pieces” bag is getting more and more empty.

Green Stuff and Steel

“Green Stuff” is an epoxy putty that’s made of yellow and blue parts begin to cure when mixed together. It’s a popular compound for modeling and is good for detailed shaping, and can be sanded and carved once it’s fully cured. I used Green Stuff to patch up air bubbles, holes from the trigger and safety switch, the hole in the front sight, and other spots that needed touch up work.

Scope Rail

The scope rail is the mount point for the blaster’s scope and shot counter, and since it doesn’t come in the DoopyDoo’s kit, I had to make one on my own. Thankfully, Billhag of the FISD made a great tutorial on making one from scratch. I used a 1/2” wide and 1/16” thick steel bar, bent it, and cut it so can fit into the top hole and rear sight. I don’t have a vise handy, so I made one out of clamps.

Makeshift vise Finished scope rail

I still need to smooth out the rougher edges of the scope rail.


Once I had the scope rail finished and I knew the right distance for the rear sight, I glued it into place with E6000. I also glued on the guards around the ejection port and front vent.

The Backwards Magazine Housing

Oops. After looking at another blaster build, I realized that I’d put the mag on housing upside down and that it should be pointing toward the front of the blaster. I unscrewed the mag housing, re-drilled the screw holes, and reattached it:

Mag housing in the right direction

I also added a bit more Green Stuff to fill out some gouges in the mag housing and stock, as well as fill in the cracks from where I glued the stock back together.