[ARCHIVED THREAD] - As simple as possible....

Posted: 10/31/2010 7:33:58 AM EDT

BUT, no simpler!

I will be putting a 9mm SBR together when Uncle Sugar gets around to sending me my stamps.

My question involves torquing the barrel nut. I'll be using a CMMG upper receiver with a Tros 5" barrel and a Spike's barrel nut that goes with their Bar 7" free floating handguard. I have the mil spec grease and all the correct tools. I have read here about torquing the barrel nut to line up the gas tube and staying between 35 and 80 ft lbs and the use of shims to assist in getting to that next opening for the gas tube.

But, with a 9mm there is no gas tube, so is there an advantage to staying closer to 35 ft lbs or 80 ft lbs?

Is there another issue with 9mm setups that I haven't read about yet?

Does the angle of the Consign change the impedance of the flux capacitor?

Posted: 10/31/2010 7:40:21 AM EDT

[#1]

57.5 ft lbs

Posted: 10/31/2010 9:54:20 AM EDT

[#2]

I took the barrels off of two 6450's of mine. One felt like it had 20-30 lbs on it, the other felt like it had A LOT of torque on it (possibly 80+).
I put them back on with 70 lbs, shot the $%^& out of them and they are still tight. No problems.

Posted: 10/31/2010 10:01:16 AM EDT

[#3]

I went with about 40 foot-pounds on my last 9mm upper. It almost got the next notch lined up too. No issues to worry about on this platform-9mm blowback is just plain simpler than 5.56mm gas operated.

[ARCHIVED THREAD] - As simple as possible....

AR Sponsor

Warning

Confirm Action

[ARCHIVED THREAD] - As simple as possible....

[ARCHIVED THREAD] - As simple as possible....