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Posted: 11/20/2009 6:14:52 PM EDT
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I just want to make sure I got the torq correct.. 30 LBs with torq wrench.. back it off and do it again 2 more times , then on 3rd time you can tighten it past 30lbs just enough to align notch on barrel nut with hole that gas tube goes threw.. and you really dont need to do it 3 times it just helps to mack sure barrel nut dont loosen up. 30min.. 80 max. in my mind the higher you torq it the more chance you take in damaging receiver? crack/twist/ turn in to paper weight
the reason I ask is. I keep reading post saying torq to 80lbs.. but vid on brownells says 30 lb then make sure tube hole is clear the TM says 30 three times. not 30 till you get to 90. or is my understanding more faulty than usual.. does it matter which side of wrench you use. 3 pin or open end wrench.. pin you dont have to push much, but open end will grab and have alot less chance of messing up barrel nut!? I turned down a piece of brass rod to make tube alignment rod. |
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You got it. Once you get to about 30 lbs on the third time, go to the next hole. You will probably realize that the torque wrench isn't that important since you stop when the nut is aligned for the gas tube. In other words, you don't have much say in the matter.
To make sure the nut is aligned I will look through the end of the receiver, out the gas tube hole and you can see if the nut's ears are equal on both sides (similar to sighting in). Sounds weird, but it works. Also, before I bother putting the gas tube roll pin in I just hold the tube in place, then test fit the carrier (no bolt, no charging handle) to see if the gas key lines up with the tube without any friction or tweaking. Have fun. |
out of while you do it
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