Please help. Over tightened muzzle device

**Gtorq21** · 07-06-20, 19:52

Hey guys I recently installed a muzzle device on my ddm4v5. In thinking I could time it a hair better I ordered a bcm crush washer. When intially screwing on brake to bcm washer I needed to turn it 180° to time it(kinda thought that was alot). That washer would not crush at all. Yes I did small increments then backed off at a time. So I had the rail in a vice properly protected. When turning the muzzle device I noticed my barrel started to turn a little as well as my upper. So now my upper is not lined up with my rail. When I look through the eotech it is plain as day crooked with my rail. What's your guys advice.

**monty_d_33** · 07-06-20, 20:07

Just to clarify, you had the barrel in a vise? Or the hand guard? Did you use a barrel torque tool?

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**R0CKETMAN** · 07-06-20, 20:09

So you clamped the rail vs the bbl? If so sounds like you twisted the hand guard

**monty_d_33** · 07-06-20, 20:20

There is a small nipple at the 12 o’clock on AR barrels that marries to an indention in the upper. That should, in theory, keep it in place but given enough torque I’m sure this could be defeated.

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**Gtorq21** · 07-06-20, 20:23

No didn't use barrel torque tool. Don't have one. Clamped the rail in a vice. Definitely barrel and upper receiver turning. It's maybe a 1/8 of an inch turn either way. I really hope I didn't damage that indention. There's stoppers on the upper receiver that we're catching it and keeping it from turning farther.

**monty_d_33** · 07-06-20, 20:27

Some hand guards have a proprietary barrel nut. What brand hand guard and how does this attach to the barrel nut?

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**Gtorq21** · 07-06-20, 20:35

It's a DD rifle. Appears to be 4 Allen screws

**monty_d_33** · 07-06-20, 20:38

I don’t have a DD, not for lack of trying, but I would assume the screws would keep the hand guard secure. You May have damaged the screws, barrel nut, or hand guard. Hopefully not all three! Won’t know till it comes off. Maybe some of the DD guys can chime in and help you out

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