AR Barrel Swap

[nairb2580]

Quick question, if I have a 10.5" 7.62 x 39 upper and want to swap the barrel for 5.56, do I only need the barrel and muzzle device or do I need the gas block and tube as well?

Thanks,
Brian

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[Mike D]

Barrel, bolt, muzzle device. You would only have to change the gas block if the diameter at the gas block is different and only have to change the gas tube if the gas system length is different.


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[nairb2580]

Barrel, bolt, muzzle device. You would only have to change the gas block if the diameter at the gas block is different and only have to change the gas tube if the gas system length is different.


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Thanks for that info. I have a BCG already. I will find out but I think the block os .75" and pistol length tube so I should be good with those. I will dig a little more when Im not at work to see what I have.

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[DFWPI]

Thanks for that info. I have a BCG already. I will find out but I think the block os .75" and pistol length tube so I should be good with those. I will dig a little more when Im not at work to see what I have.

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BCG for 7.62 will not work with .223/556

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[nairb2580]

Yes sir. I have a 5.56 BCG.

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[Clay C]

Thanks for that info. I have a BCG already. I will find out but I think the block os .75" and pistol length tube so I should be good with those. I will dig a little more when Im not at work to see what I have.

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You will need a carbine length gas tube for the 5.56

[nairb2580]

You will need a carbine length gas tube for the 5.56

Unfortunately the upper has been discontinued and the info is no longer available but looking at some that are comparable it most likely has the carbine length gas system. Still dont see any info on the gas block size. I may just get a new block and tube to be on the safe side. They arent too expensive I dont believe.

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