Removing stubborn barrel nut on Diamondback DB15EB

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  • Apr 3, 2017
    26
    I have a Diamondback DB15EB that I'm modifying with an HBAR barrel for compliance. I've been working on cars since my teens, so I didn't expect this to be too rough.

    But, I may need some advice on how to remove this barrel nut. It's not the milspec variety that's in all the howto videos. It's a low profile nut with a polished smooth exterior for the floating hand guard to clamp onto.

    I put the upper on a Geissele reaction rod in my vice and put an adjustable wrench on the nut side. I've pulled and pulled and it's not budging. I know this stuff is high carbon steel, but it still feels like stuff is going to snap. My little vice doesn't like it.

    Should I put an extension bar on the wrench or is there a better technique?

    See attached pics.
     

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    Apr 3, 2017
    26
    My wife walked by to see how things were going. She gave me manly strength because I tried one more time and it broke loose. Go figure.
     

    clandestine

    AR-15 Savant
    Oct 13, 2008
    37,031
    Elkton, MD
    Heat the Barrel/Rail Rut with a torch till it smokes. Then try again. I wouldnt use an adjustable. A good crows foot with a breaker bar would be best.

    If that does not work then hit the back and front of the nut with PB Blaster, let it sit for an hour, and add heat again and repeat.

    If that does not work let me know.
     
    Apr 3, 2017
    26
    I expected to use the Precision Reflex wrench and my torque wrench, but I didn't realize it would require a different tool. I'm just making do with what I have.
     

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    JTH20

    Active Member
    Feb 18, 2013
    536
    MD
    Looks like the nut I installed for a free floating handguard from Rev Arms (copy of the AR Stoner handguard). I had to use a crow's foot and baby it until it was torqued down. God knows if I'll ever be able to remove it.
     

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