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Posted: 1/25/2005 4:59:12 PM EDT
| Is there some rule of thumb or other method to end up with a notch in the tightening ring lining up with the gas tube opening in the upper receiver. I usually end up a little short in the clockwise rotation of being able to align, and don't want to back it off to the next notch.... |
| sometime you really have to torque the nut on there, i have installed barrels before that didnt require but around 30 foot pounds, others that required 60.... the best thing to do is set your torque wrench to the max (75), and line up the gas tube groove with the upper and dont go past 75 foot pounds or you may damage the receiver.... |
And when you reach 80 and it's still not lined up, tighten it up some more. It happens. Use the proper lube on the threads and properly support the receiver and receiver damage should not occur. |
+1. My carbine took 86 ft-lbs. to line up, but it works perfectly. |
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