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Assembling Grendel upper, would love any tips/tricks/info to help accuracy
#10
AskDrTodd Wrote:When assembling, clean the threads, then a bit of moly grease, then torque to 60, back off, torque to 60, back off, torque to 60 and then turn to next available port so gas tube aligns properly

Your torque values are also much higher than most recommend for the initial torque (30 ftlbs).... I'd be worried I could not get to the next gas tube hole without exceeding the 80 ftlb max. My experience has been that to index just a hair to align the gas tube holes can be a 5-10ftlb torque increase.

Maybe this is a secret accuracy thing, but not something I heard or read about either as a solution nor a problem area. I have heard/read of folks overtorqueing and destroying the upper receiver threads. No fix other than to toss it, and buy another.
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Assembling Grendel upper, would love any tips/tricks/info to help accuracy - by pinzgauer - 03-09-2011, 11:58 PM

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