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Posted: 8/25/2024 7:33:28 PM EDT
I know it is probably something pretty simple that I am doing wrong. In order for the rail to slide onto the barrel nut and be aligned correctly, one of the barrel nut fins/spikes has to be in the 12 o’clock position. But in this position the gas tube can not slide into the upper receiver. Because the fin/spike is in the way. What am I overlooking?
  
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Posted: 8/26/2024 5:06:15 AM EDT
[#1]
That seems odd. Looks like your only option is to torque the nut down to see which nub is in the way and remove it.
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Posted: 8/26/2024 6:13:56 AM EDT
[#2]
You need to torque it until the cutout lines up to allow the gas tube to fit. Torque should be at least 30 up to 80 ft lbs. if you can’t line it up in that range there are shims you can buy to help align properly. Same concept at the standard barrel nut used with plastic hand guards.
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KS, USA
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Posted: 8/26/2024 6:55:47 AM EDT
[#3]
Time the barrel nut to allow gas tube passage. IIRC the rail goes on offset, then twists back into position once fully seated. Look inside the rail and see if there is a cutout running around the circumference.
After twisting the rail into position, tighten the bolts on the bottom. |
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Posted: 8/26/2024 8:39:52 AM EDT
[#4]
Quote HistoryOriginally Posted By turp_dog: Time the barrel nut to allow gas tube passage. IIRC the rail goes on offset, then twists back into position once fully seated. Look inside the rail and see if there is a cutout running around the circumference. After twisting the rail into position, tighten the bolts on the bottom. |
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