GunLab

Parts wanted and for Sale!

Looking for G-43 fire control parts. Hammer,trigger,sear. This is for one of the projects we are working on. A friend of Gun Lab has helped out with this. Thanks

Continue reading Parts wanted and for Sale!

We are now taking reservations for out reproduction VG1-5 rifles! Price is $4000, and they will be ready to ship once ATF gives final approval on the design. The get on the priority list, contact Matt or Greg at Allegheny Arsenal – (814) 362-2642. No payment will be taken until the guns are ready to ship.

The Mauser 1917 trench carbine receiver

I have reverse engineered most the lower receiver in Fusion 360 and will print the first model this week. This is the first print so I can test my solid model. Using the Bambu P2S printer I will print a 3D model. There are a number of modifications that will needed to be made, but I can check my initial model.

The 3D print is completed and as suspected there are a couple of changes that need to be made.

But the overall model is on.

The issues that I have found deal with the measurements and using photos that were not an exact 90 degrees. Not comes the fun part of making minor changes to correct the issues.

More on the Sudanese AR-10

With the last test model machined I started putting the lower together and a number of issues were noted. The receiver dimension is correct for the holes, magazine release, magazine well and overall length and width. the magazine button and release lever are not deep enough.

These are the noted problems.

The first one is a very slight radius issue on the rear of the receiver just prior to the buffer tube

The second issue concerns the magazine release lever. this needs to be cut deeper to allow proper fit.

The third issue deals with the hole for the selector. There is a slight inset in the receiver to all the selector to set properly and this needs to be cut in. This is how it looks on the original.

And you can see it is missing on my test receiver.

The last issue is raised portion of the receiver around the magazine release. On my receiver it extends to far over and does not line up with the upper receiver properly.

With some minor changes to the machining program I hope to correct these issues.

OP. 4 on the Sudanese AR-10 lower

The 4th op is to thread the rear of the receiver for the buffer tub and to drill the hole for the rear take down detent pin and spring and the stock alignment hole. The holes were first cut to the proper size then a thread mill with the proper pitch.

threaded the correct number of threads with the proper pitch.

To accomplish this step a fixture plate was design and machined.

And orientated to hold the part in the correct position.

After machining the actual buffer tube was installer to verify proper fit

The completed receiver is getting closer

Mauser V9000 trench rifle

While doing research on the 1917 trench carbine I came across a rifle that I have never seen or even heard of. The V9000. There is a video on YouTube posted by LAI Publications. I just fell for this cute carbine.

It also dissembles and the stock comes off.

There was a print of it taken apart.

I thank LAI publications for posting about this rare and interesting weapon. I decided that I need one in my collection. There is no chance of buying one and it is full auto so actually making one that is exact is out of the question. However I can make a semi auto one. As with all of my projects I need to design it from scratch. With that in mind I have started just that, but I am making a few changes to the design. First I will make it in 9mm and not in 7.62×25 Mauser. Second, I am going to make it to use a different magazine. I have never been a fan of the Mauser style magazine. they are expensive, a number of the ones I have do no fit properly and they are hard to fine.

My favorite magazine for my Broomhandle projects is the Finnish M/20 smg magazine. They are available at Apex gun parts.

It is a great magazine that I will cut down to 25 rds.

The first step was to design the lower receiver to use a M/20 magazine. I started this process with using a cut Chinese Schnellfeuer lower.

I was able to make a basic solid model but with the proper dimensions for the M/20 magazine.

There is a number of features missing from this model but, it is just a starting point. So I printed it out on m Bambu P2S 3D printer.

I was able to check to see if my magazine housing was dimension properly, and it was.

The next print will have the magazine release button. The rear of the receiver needs to be corrected. the bottom of the receiver is to thick and it receiver needs to have internal dimensions reduced. I am currently working on the second model receiver and should have it completed by the end of next weekend. I also need to add the dove tail slot in the front of the receiver

1917 trench carbine 3D prints

With the new Bambu P2S printer here I decided to start printing out some of the components of the 1917 trench carbine to verify the design and measurements.

The first part that I printed out and checked is the fire control group. I Then used Bambu studio to do a slicing program on it. It was down loaded and printed out

After it was printed out it was checked with actual components to verify proper fit up.

There are a few minor changes that need to be made, but so far it does not look to be out of spec.

Why it is necessary to run a test part after changes to the program

A number of changes were made to the Sudanese AR-10 lower receiver. Selector stops were added and a new profiling program was used to allow for a better finish around a few areas of the receiver. Then a second lower was machined out of 6061 to verify the changes. During the process of machining a few issues were notes. The first is that with the new tool path it left on a thin section of metal.

The magazine release button also changed from an inside cut to and outside cut.

The other issue that was found was that the selector stops were located in the wrong spot.

All the issues have been corrected and checked. Next is to design a logo and write the printing program then start making Sudanese lower semi receivers.

More work on the 1917 Mauser trench carbine

In this post I am going to chat about a single part. The Lock frame stop. This individual part is common only to the carbine. The take down lever. you can see it here in this photo that I found on line.

This is the part in question.

Here are the patent drawings that I have been able to locate.

This last one is a color picture from a book

All the references are different then the patent drawings and while I have made a solid model of the part I am not sure it is correct.

This is the solid model.

I am currently at a loss in the proper design. I am not sure what holds it in place and it’s relationship to the magazine release. I am hoping that when I 3D print the lower receiver I can get a better understanding of how this part is actually design and fits into the weapon

Japex wire EDM update

I have received a number of questions concerning the Japex wire EDM that I have. Where can you get help repairing the machine, where can you get consumables for it and is there anyone that can help with getting it operational.
I used to recommend Bret at McWilliams sales and service. Well Bret has retired. The person to call now is Kurt at 734-449-4008. The contact email is kurtm@McWilliamsedm.com. I chatted with Kurt in depth and he seems like a very nice guy to deal with. He can help with some spares, board re-build and technical support plus consumables. He also has a couple of technicians to help with troubleshooting. The web page is also back up, https://www.mcwilliamsedm.com/index.html

Hope this helps all the people looking for help with there Japex machines.

1917 Mauser trench carbine

This Project is definitely interesting one. By using a combination of engineered drawings, pictures and C96 parts to measure I have been able to get a reasonable set of solid models. I started on the lower receiver but it did not take long before I realized the the fire control group holds the key to some of the interior dimensions, information needed to allow me to draw up the lower and match it with the upper slide assembly.

These are the pictures of the different fire control groups.

This is the second fire control group I located.

and finally the third type.

compared to a C-96 fire control group.

There are a number of changes between all the models. It was a start and next came the solid model attempts. there are subtle changes between all the models.

The first model

Second model

The third version.

And finally the fourth model

When all the fire control components are modeled I will work on an assembly. This will allow me to check for proper fit and measurements.

Machining the Sudanese lower receiver op.2 and op3

With op 1 completed it is now time to work on op 2 and 3. First a fixture needed to be machined to hold the machined receiver to all finishing the other side.

The machined op1 piece was set in the fixture and tighten down