There is a good article at the firearms blog concerning the tappet system of operation. This is the operating system used on the M-1 Carbine and on the Beretta 30 carbine rifle. Check it out.
While I am on the topic of interesting stuff on the internet. If you have not been to Impro Guns you should check it out. Here is there web page.
One last link and that is for a guy that makes some nice stuff. I go to his site quite frequently to study his methods.
I have not finished the editing of the Japanese 99 magazine stamping die video. So today I am going to post a video of the illegal gun making in the Philippines. This video really reminds me of the first weapon that I made 40 years ago. No machine tools to speak of and no quality control. Just keep filing until it fit and operated. I will have the edited video this weekend.
This is a video that I just saw posted at weapons man. If you are not going to his site yet you should be. This is a video put out my the British government concerning making the Sten gun. It is well worth watching.
We have finished what I think is the last of the designing work on the chamber fluting press. Next week after the die is off the HAAS machine we will start machining the individual components. So here is the final design.
We added a guide rod to insure that the tool head will not move. We also now use 4 pins instead of three for the lower plate. This was necessary to add the slot for the guide rod. It will be exciting to complete this project and have it mounted and finishing the barrels.
A friend of mine dropped me an e-mail wanting to know if I had drawings for the trunnion of a MP-44 and being a fanatic on engineered drawings I said yes. These are the same drawings that are all over the internet and they are wrong. So I decided to set down and make a correct solid model for him. Using the drawings as a starting point then I measured one as well as the parts that attach to them.
This is a solid model that I did last Saturday on the trunnion.
There are differences even between trunnions. Here are pictures of one in the rifle and one that has been removed from a rifle. You can see the differences just in the upper radius where the sheet metal attaches just below the gas tube. The first photo is one in the rifle.
This is a different maker.
Notice the extended lips on the second picture verses the one still in the rifle.
In addition to drawing the part up a friend also did an analysis of the steel in the trunnion.
The specification for this part is C 0.45; P 0.044; S 0.039; Mn 0.62; Si 0.23; Ni 0.08
Hopefully after we finish the 10 projects that are on the mills now we can make a few for him.
As always comments and opinions are appreciated.
I was able to accomplish a little more on the addition to the Fab shop. That is until we ran out of materials. Here are a few pictures of what little work that was accomplished on it. Just so you have an idea of the progression. This is me fighting with the compactor a while back trying to get the soil ready.
And when I was finally done with this fun task.
We did have a little rain here that helped settle it even more.
Over the period of two rain storms we had over 5″ of rain.
This is a little video of the water running around the fab shop.
Now it is on to the next exciting part setting the steel and the frame for the concrete pour.
I hope to be completed with the steel and framing by next weekend then pour in two weeks. We will see how well that plan works
The part this weekend is actually a complete bolt and bolt carrier for a Chauchat light machine gun. The pictures are from “Collector Grade Publications” book “Honor Bound”. This is another book that you should have in your library.
Once again comments and ideas are welcome.