Buffer Tube Torque Spec

[FortTom]

Long story short I'm chaning out my whole buffer tube/crown/latch assembly. I keep finding 2 torque specs for the crown nut, 40 inch pounds, and 40 foot pounds. Can someone please straighten me out here? Sorry if this is the wrong thread.
Thanks,
FT

[5pins]

According to the latest TM the torque specs are 38 – 42 ft-lb. The inch pounds was a misprint from an older TM.

[UWone77]

Personally, I set mine for 30 FT-LB, then stake accordingly.

[FortTom]

That sounds more realistic than in/lbs. Thank you both.
FT

[markm]

I've never used a torque wrench on the castle nut. I just use as much common sense snug as I can get on the nut with a Hammerhead tool. It's short enough that you can't gall the threads, but large enough of a wrench that you're gettting decent torque.

[CGS]

40 Ft Lbs is correct, wow 40 inch pounds would be something!

I don't generally torque castle nuts, you can get 40 ft lbs without a torque wrench. That's snug and then a little more snug. Snug until the lower receiver puts pressure on the mag block and stop. Proper stacking will prevent the nut from loosening.