I will show you the easiest & cheapest way to go about building your own mg-34 out of stuff you can find at the local Lowes or Home Depot.
**Danger**You can get hurt using tools so take the time to read the instructions and safety manual before doing something that can get you hurt! I recommend to always wear safety glasses, because without your sight you couldn't watch Star Wars movies or finish making your blaster!!!
Step 1: The Receiver
Materials needed:
2 - 3/4"X 6" X 36" Hardwood boards (they are called craft boards at Lowes)
Wood glue, drywall screws (fine thread is best)
Scroll saw or sabre saw, Drill, Dremel tool
Printed templates: Left / Right & Middle (Right click on the pictures and then save them to print off later)
Instructions:
Print the templates and cut out the pictures, making sure to take your time and keep the lines as straight as possible. Tape the top and bottom pieces together so they line up correctly. Put the templates on your board and try to place it so that you don't waste any board space. Trace around the left/right template then repeat the process so you end up with 2 left/right traces. You only need one of the middle template. When cutting these out with the saw take your time It will be worth it later. When you are through cutting you should end up with 3 pieces, left, right & middle. Using the wood glue put the three pieces together. Drill 3 pilot holes spread out on the receiver, then put in some drywall screws to re-enforce the glue. Let this dry for a while. See photo:
After you have let the glue dry, take some time sanding the receiver. You should do this now and get it over with! I used the dremel tool and a belt sander to smooth out the edges. The next step is to find a cutting bit that will be big enough to make the hole for your pvc barrel and stock to fit into. I used 1" pvc with 1" connectors. To make the barrel removable you will need to make the hole in the front of the receiver fit the connector not the actual pipe. I used a 1 1/4" hole saw. If you have to make the hole a little bigger than the connector thats ok, glue will fix the rest. The rear hole must be drilled to fit the 1" pvc pipe and not the connector. I used a 1" hole saw, but had to sand the hole to fit the pipe. See photo for hole placement
Trigger Assembly
Materials needed:
1 - 3/4" X 6" X ?" Left over from receiver board
Small Screws
1/8" thick sheet styrene
Utility knife or exacto knife
Drill, Scroll or saber saw, rotozip tool, Dremel tool
Printed trigger assembly template : Trigger Template (Right click & Save then print)
Instructions:
Trace the template onto the wood then cut it out. I used a rotozip tool to cut the inside part out, but it can be done with a saber saw if you start a hole with your drill. It is very important that you cut this as straight as possible. If it isn't straight it wont fit in the receiver right. The blue part of the template must be cut out so you can make the grips. Trace the template on the styrene and make a left and right side for the trigger assembly. I used a razor knife to score the styrene and then bend/break it. Take your time doing this, it can look pretty bad if you don't! After the cutting center the grips on the assembly and drill pilot holes for the screws, Be sure not to make the pilot holes too big, you want the screws to hold the grips down. Screw the grips to the trigger assembly. Sand the trigger assembly and grips, smoothing the edges. Test fit the trigger assembly into the receiver and sand the edges for a better fit. Drill a hole through the trigger assembly as in the photo to attach the trigger assembly to the receiver. make sure to drill a pilot hole in the receiver to accept the screw without splitting the wood.
The photo below is what you should have so far. I added my trigger to the assembly at this point. I made it from the styrene and sized it to my hand, yours would be different so I didn't make a template.