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Thread: FH Torque

  1. #21
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    When torquing a MD, I just grab a 19mm wrench, standard "open end / box", and time it with that. It would be pretty hard to get into any high torque with it.. unless of course your hanging off the end of it. Putting a muzzle device on is not a science. Rocksett and some shims and be done with it.

    If you can not freely spin the MD all the way to the collar, you need to see why, and stop tightening right away..
    Philippians 4:13

  2. #22
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    It's a good heads up to say that the parts should thread on with moderate finger pressure until it stops abruptly with a shoulder. That does not mean that the system is good to torque to X amount of torque to that. That may, or may not induce issues depending.

  3. #23
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    Sorry for the absense here guys. In the middle of moving to a new place and this had to go on the back burner. I finally got a chance to pull off the FH and inspect everything. And I also found my problem. Somehow, between the last upper I put together a month ago and now, my torque wrench decided to stop working. It gives me a torque value (clicks when reached) for left hand threads, but for standard threads, it is basically acting like a breaker bar. I should have known beter to stop monkey gripping it, but it looks like everything is still in good shape.

    Threads in the FH look good, but the only sign of wear is on the shoulder of the barrel threads. Not sure if there was a "false shoulder" that I pushed back into the rest of the shoulder, but it should still hold the FH nicely once I can get an accurate torque. Any suggestions/comments?

    Here's what it looks like:

  4. #24
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    Quote Originally Posted by RVTMaverick View Post
    Hey Ironman,
    Did you get it figured out?
    Quick question & Heads UP on your "torque wrench" IS Yours the style which has the square driver that pops back and forth through the wrench head? Or does yours have the lever that on the back of the head that switches back and forth for right hand and left hand threads??

    IF yours doesn't have the lever or knob style, then it is quite possible you have the driver in Wrong side = said torque wrench is then NOT going to torque anything, it will just act like a regular wrench,... unless you just happen to be working a left hand thread. LOL

    Peace Jeff


    PS. Even IF BufordTJustice is correct about the threads/shoulder (FWIW: this advice does Sounds good to me too).... 30 foot pounds should kick over easy enough.... 2 cents
    Jeff,

    My wrench has the lever on the back, so I would have known if it was set for left hand threads. Thanks for the help.

  5. #25
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    I, personally, never go over 30 Ft/lbs

    YMMV
    Last edited by HD1911; 12-19-15 at 22:42.

  6. #26
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    Quote Originally Posted by HD1911 View Post
    I, personally, never go over 30 Ft/lbs

    YMMV
    Since I dont suppress my ARs I dont follow any set torque value. After listening to the advice of some top high power guys I am now of the opinion that any torque over the minimum required to keep the muzzle device on the barrel negatively affects accuracy. Now I simply apply rocksett, hand tighten and seat it with a jerk of a wrench and let it dry.

  7. #27
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    That "jerk of a wrench" might be more tq than you think...

  8. #28
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    Quote Originally Posted by vicious_cb View Post
    Since I dont suppress my ARs I dont follow any set torque value. After listening to the advice of some top high power guys I am now of the opinion that any torque over the minimum required to keep the muzzle device on the barrel negatively affects accuracy. Now I simply apply rocksett, hand tighten and seat it with a jerk of a wrench and let it dry.
    I actually don't go above 30 for that reason... because at around that point, the bore can actually constrict up to half a thou, and yup, negatively affect precision.
    Last edited by HD1911; 12-20-15 at 01:45.

  9. #29
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    Quote Originally Posted by WS6 View Post
    That "jerk of a wrench" might be more tq than you think...
    Not really, Ive tested it without rocksett and I can easily remove the muzzle device with my bare hands pretty easily. I dont apply much force at all when I seat the MD.

  10. #30
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    Roger that. As to rocksett, I can't even tell when it's been used. It's more of a resonance damper than anything. Shear value is negligible. All these people whining about how permanent it is likely have no idea how much torque was used on their muzzle device...

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