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2/15/2011 4:31:40 PM EDT
Quck question. I just got my Midwest Industries SS 12" in. Is it safe to assume the same process applies to this barrel nut? Hand tighten 2 or 3 times, then torque to 30+ lbs/to next gas tube hole?

Thanks in advance.
2/15/2011 4:55:44 PM EDT
[#1]
Quoted:
Quck question. I just got my Midwest Industries SS 12" in. Is it safe to assume the same process applies to this barrel nut? Hand tighten 2 or 3 times, then torque to 30+ lbs/to next gas tube hole?

Thanks in advance.


The barrel has nothing to do with how much torque you apply between a standard barrel nut and the upper.  Assuming the MI barrel has the proper flange thickness (which I will accept unless shown otherwise), you follow the standard procedure.

Your listing of the procedure is off though.  You TORQUE to 30 ft/lb 3 times, loosening between each time, and on the 4th time, torque for at least 30 but no more than 80 ft/lb to align the next notch on the barrel nut.  When you do this, you'll see the nut go farther around with each tightening.  DO use a good grease, and if you want to do it "by the book," use a MIL-G-21164 compliant grease like AeroShell 33MS.  A 14oz tube will last so long your grandkids will be building rifles with it.

Note that NON-standard barrel nuts (like for free float rails, etc.) may not have the same torque specs.
2/15/2011 5:03:18 PM EDT
[#2]
Quoted:
Quoted:
Quck question. I just got my Midwest Industries SS 12" in. Is it safe to assume the same process applies to this barrel nut? Hand tighten 2 or 3 times, then torque to 30+ lbs/to next gas tube hole?

Thanks in advance.


The barrel has nothing to do with how much torque you apply between a standard barrel nut and the upper.  Assuming the MI barrel has the proper flange thickness (which I will accept unless shown otherwise), you follow the standard procedure.

Your listing of the procedure is off though.  You TORQUE to 30 ft/lb 3 times, loosening between each time, and on the 4th time, torque for at least 30 but no more than 80 ft/lb to align the next notch on the barrel nut.  When you do this, you'll see the nut go farther around with each tightening.  DO use a good grease, and if you want to do it "by the book," use a MIL-G-21164 compliant grease like AeroShell 33MS.  A 14oz tube will last so long your grandkids will be building rifles with it.

Note that NON-standard barrel nuts (like for free float rails, etc.) may not have the same torque specs.



The MI SS 12" is a free float tube, not a barrel.

The install procedure above is correct.
2/15/2011 5:08:13 PM EDT
[#3]
Perfect, thanks guys. Was confused reading that first post. On a side not, I can't believe how light this tube feels. I'm not sure what I expected but this is for my first build. Should do final assembly and test fire tomorrow! Can't wait.
2/15/2011 5:08:48 PM EDT
[#4]
I guess I misunderstood.  Thanks for the correction.
2/15/2011 5:33:24 PM EDT
[#5]
I love my SS12 to. It is the litest 12" made.

2/15/2011 6:28:53 PM EDT
[#6]
I'll make sure and post a pic when I get done. I have OD Green magpul furniture so I ordered the SS in ODG as well. Also sick gun.
2/15/2011 7:00:20 PM EDT
[#7]
Quoted:
Quck question. I just got my Midwest Industries SS 12" in. Is it safe to assume the same process applies to this barrel nut? Hand tighten 2 or 3 times, then torque to 30+ lbs/to next gas tube hole?

Thanks in advance.


Did MI not include instruction?
2/15/2011 8:35:19 PM EDT
[#8]
They did but the step that refers to putting on the barrel nut says
Install the barrel nut and hand tighten. Using the MI barrel nut wrench, tighten the barrel nut to the aligning gas tube hole in the barrel nut and the upper receiver.

Nothing about torque or anything like that. Wasn't sure if the MI nut is the same material as the regular nut therefore maybe different torque value. Apparently not.
2/15/2011 9:15:46 PM EDT
[#9]
Me neither,  Call them
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