Unitized Gas System

[84mmcarl-gustav]

Hi, about “screw and glue” method, the front band, gas cylinder and spindle valve are assembled in a fixture,my question is for the Spindle valves is hard,must be annealed,,what is the best Procedure to do it.And is there a drill jig available around,thanks for your info

 

[Bakersfield7.62]

I asked my uncle this same question to see if he had the tools to anneal at his machine shop and run up dry I have heard of ppl welding them at m14 Clinique but have never seen one machined and screwed according to the national match specs !

 

[Kayser Sose]

Just so you know, I 'High Heat JB Weld'ed my gas cylinder and ferrule together, with proper clearances (lower ferrule lip not touching the stock) and its held (and helped?) so far...

 

[45ACPKING]

The screw and glue method isn't very common these days and a royal pain in the azz even with and annealing oven.
So much room for error that unless you have a pile of spare parts handy... Probably isn't the best route to go.

 

[Marsh Monster]

So whats the best way to do this if you don't have access to a TIG welder. Can you braze it?

 

[Seafury]

So whats the best way to do this if you don't have access to a TIG welder. Can you braze it?

I would think a real mig would work. Brownells has unitized SAI gas systems that are screwed. I think they were about $100.

 

[45ACPKING]

Ya, I'd try and get one that's already done over trying any other method than TIG , on a heatsink with a rod oven for preheating and slow cooling ideally.

If anyone has access to a TIG machine for doing fine work, I can provide you with all the "how to" details.

And, don't use mig, stick ect they are not at all suitable for unitizing these parts.