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Thread: RJF AR-15 Barrel

  1. #1
    Gunco Veteran AK Builder FloridaAKM's Avatar
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    Default RJF AR-15 Barrel

    I picked up an AR-15 barrel today @ the gunshow & when I got it home, I found out that it had two (2) factory gas ports drilled into the barrel...

    One is in the correct place & the other is 5/8" forward of the correct one! Returning it is out of the question as that is three hours South of me to go back & try to find the vendor. My question/proposal is to plug the incorrect hole, not to enter the bore & TIG weld the top of the plug to repair the otherwise excellant barrel & use it as a truck gun. The weld will be very small weld puddle & be between the FSB journels. What do you guys think on this matter!

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    GuncoHolic 555th's Avatar
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    A small TIG weld over a plug would not be a safety issue, but I would not do it to anything that I wanted to be accurate.

  3. #3
    Gunco Member Johnny_V's Avatar
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    Providing the gas block covers the other hole, I would JB Weld the hole and let it go. The JB Weld, even if it creeps a bit into the barrel, will conform to the lands and grooves once fired (as long as you don't fill the barrel with it)

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    CEO Macon Armory Inc. Mad-Machinist's Avatar
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    If you have a gas block that covers both......shoot it......having done the swiss cheese barrel during prototype development .......the extra hole will fill with carbon and form a plug so dense you'll have to drill it out......

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    Gunco Member Johnny_V's Avatar
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    Quote Originally Posted by Mad-Machinist View Post
    If you have a gas block that covers both......shoot it......having done the swiss cheese barrel during prototype development .......the extra hole will fill with carbon and form a plug so dense you'll have to drill it out......
    Agreed..........
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    Gunco Veteran AK Builder FloridaAKM's Avatar
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    I'll have to press an interference fit pin in it, surround the site with a heat absorbing material & quickly plug weld the pin over. It is not covered by the FSB, but falls between the two bases that lock the FSB to the barrel! Thanks for your replys!

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  7. #7
    gunco irregular moleman's Avatar
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    Could you just replace the fsb with a clamp on or setscrew type that doesn't have a raised center section?

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