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Gas tube slide question


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#1 Orion

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Posted 21 April 2018 - 06:06 PM

I dis-assembled my BAR and noticed the gas tube slide and piston were loose is this a normal condition?

 

Thanks for the help.

 

Andy


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#2 Normal1959

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Posted 22 April 2018 - 11:11 AM

I dis-assembled my BAR and noticed the gas tube slide and piston were loose is this a normal condition?

 

Thanks for the help.

 

Andy

Mine is tight but i do have a spare that has an (ever so slight wobble)   

Eric


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#3 Orion

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Posted 23 April 2018 - 10:53 AM

Thanks Eric, I have a lot of movement but it operates fine; I just want to make sure it will not cause any excessive wear issue's.

 

 

Andy


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#4 Normal1959

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Posted 23 April 2018 - 11:34 AM

Thanks Eric, I have a lot of movement but it operates fine; I just want to make sure it will not cause any excessive wear issue's.

 

 

Andy

Is your WW2 or WW1 ???     Should be easy to replace WW2 and it should be tight. I would correct that issue.

Eric


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#5 emmagee1917

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Posted 23 April 2018 - 12:53 PM

Should wiggle a little . There is only a couple of thousandth clearance between piston and cylinder , far too little for a ridged rod of that length to hold . As the piston enters the cylinder , gas pressure will cause it to find it's own center . Same for coming out . This is why you see pics of Marines stripping their BARs after a beach landing , one grain of sand there will lock her up . Otherwise , she's about bulletproof .

Chris


Edited by emmagee1917, 23 April 2018 - 12:54 PM.

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