torque?

[benchmstr]

what do you guys torque your AR15 barrels down to?

i have my noveske 18" lightweight in the mail, and should start putting all my parts together soon...i normally dont even use a torque wrench..i just get it tight...but i am actually going to do this one right...from what i read its between 35-85lbs.....so whats yalls magic number?

bench

 

[deadly0311]

Re: torque?

anywhere in that range where the gas tube is able to pass freely through the grooves on the barrel nut

 

[command450]

Re: torque?

clean everything up good and grease it.I like to set it(turn it down) 3 times, then go for the final set at atleast 40lbs. sometimes it may be at the high end before it lines up, and if thats teh case you can face the front alittle, then she times in just right. some knock off a tooth if its in the way...I dont like that,myself.

so 50-60 is my number,and if its not there,I will make it get there

 

[USACS]

Re: torque?

I do a minimum of 32, but then I begin to line up the barrel nut. By the time the nut is in the right place, I am at 40-60 ft-lbs.
Go buy some moly grease/spark plug grease to grease the threads to prevent the nut from seizing to the upper receiver.

 

[madcratebuilder]

Re: torque?

Clean the threads on the upper and barrel nut. Apply a light coat of moly grease. Torque to 30lbs three times then torque to align the gas tube. Minimum is 30lbs and some go as high as 80lbs. If I get past 60-65lbs I try a different barrel nut. You can use a number 15 twist drill (0.180 inch)as a gas tube alignment tool.