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Type: Posts; User: Grizzlypeg

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  1. Replies
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    The good news is that it does work well, but as...

    The good news is that it does work well, but as said, its a one off. Took the rifle to the range last night. First three shots made it clear that the scope needed some adjustment. After all that...
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    262907 Final version.262908

    262907

    Final version.262908
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    I am afraid this project is something of a...

    I am afraid this project is something of a failure. The only way to make such an adapter accurately, is to machine it on the same barrel that it is going to be installed on. There appears to be too...
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    One of the challenges in this project is having...

    One of the challenges in this project is having the two machining operations on opposite sides of the adapter, concentric and in axial alignment. One the internal drill and tap, and the other the...
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    I have some stainless and some 1045 steel coming...

    I have some stainless and some 1045 steel coming to work on the next version. Some of the things I'm learning by doing, and don't have the experience to anticipate all issues, or plan them out ahead...
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    That's a good suggestion. I've turned them down...

    That's a good suggestion. I've turned them down to 1/2-28 and used a brake designed for a 223, having reamed it out for 308 clearance. That worked very well, but its a one way trip for that barrel....
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    The barrel I believe has to seal to the adapter...

    The barrel I believe has to seal to the adapter internally, by having its nose seal up against the inner surface of the adapter. At least that's the way it works with an M14 flash suppressor. The...
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    Attached to a barrel stub from a metric M14. I...

    Attached to a barrel stub from a metric M14. I am going to make another with more pleasing dimensions, but this is my first one.


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    Too bad its the wrong thread. The M14S from...

    Too bad its the wrong thread. The M14S from Norinco uses M15 x .75 threads.

    I can remove the barrel for the job, and the front sights are on the flash suppressor that will have to come off to be...
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    Makes sense about the one off vs trying various...

    Makes sense about the one off vs trying various brakes. I am mostly doing this for the fun of it, and would like to do it the more complicated way of making an adapter. I can buy a brake that just...
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    Yes, definitely the threads cannot be on top of...

    Yes, definitely the threads cannot be on top of each other. Wish I had an easy way to post up a drawing. I envisage a section that goes over the barrel, and a 5/8 threaded portion forward of the...
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    Yes, it is a Norinco M14 with metric thread. The...

    Yes, it is a Norinco M14 with metric thread. The barrel is threaded M15x0.75 for the flash suppressor nut. That thread can also be used to attach a muzzle brake. I want to make an adapter that...
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    Machining a barrel thread adapter

    I want to machine an adapter that screws onto a metric m14 barrel that has M15x0.75 pitch external threads, to convert to 5/8 for more standard muzzle brakes. Concentricity and alignment are going...
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