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Working on the MP-44 trunions.

We have started on Pete’s, a friend of gun lab, new 4140 MP-44 trunions. This series of videos and posts is the process we used to make them.

First the video.

Here are the pictures going over the changes and the steps we took.

We needed to change the depth of cut for […]

Building a MP-44 semi part 1

In previous post we showed the process of machining out a MP-44 trunnion. To test that our trunnions are correct Pete, a friend of gun lab and owner of the trunnions, has started a project of rebuilding a badly torched cut receiver.

It must be stated up front that Pete is licensed to manufacture weapons […]

Another interesting MP-44 style rifle

A friend of gun lab sent these series of pictures of an MP-44 under folder rifle. I don’t have much to say about it other then it looks very interesting and I would like to have one.

A couple of pictures of the rifle with the stock extended.

This is one with the stock […]

Life at Gun Lab, studying the MP-44 receiver

Here at gun Lab what we do is study weapons and at any time you could come across anything. A set of EM-2 locking flaps,

a Destroyer carbine,

a Vickers cut away lock,

Hand drawn prints for a weapon

or a French MAS 36 22 trainer cartridge adapter.

Anything and […]

MP-44 trunnions update

We finished the first 6 test sample MP-44 trunnions to the buyer. This is an update report on the product. At the time we made these we had no flats to test them against so certain measurements could not be verified against an actual matching part. This lead to a couple of minor dimensions that […]

OP 7 completed on the MP-44 trunnions

Op 7 has been completed. This is a major mill stone on making the MP-44 trunnions. The rest of the machining will be done on the manual mill. It will be easier on the manual mill then making the number of fixtures and tooling that would be required on the cnc machining center.

This is […]

More on the MP-44 trunnion

Operation 6 has been completed on the MP-44 trunnions. A couple of problems were noted. The first is the difference in length on the front of the trunnions and the second was the fit up of the locking shoulder.

This photo shows the difference in the lengths

You can see the corrected locking shoulder fit […]

MP-44 trunnions finish op 6

We have finished operation 6 on the MP-44 trunnions. The reason that we started with 6 samples was to insure that we would have correct samples when we finished. Two of the trunnions ended up out of spec after we finished this operation. The drawings and cam programing were changed to correct and problems. These […]

Continuing the MP-44 trunnion

We have just completed the first operation 6 on the trunnion. It has also pointed out a few minor differences. When we started this project all we had was an original trunnion in very bad condition and a collection of out of spec drawings with incorrect dimensions.

Later a trunnion in very good […]

MP-44 Trunnions up date

We have now finished the first six test pieces up to the 5th operation. This next week we will complete op’s 6 and 7 and send them for verification for proper fit.

With the first 5 operations completed we will be starting on op6 soon. This is a master cam simulation of the process.

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