I was wondering if anyone has had any issues with Yankee Hill Machine free float hand guards. This isn't a huge deal but I feel that I am having to tighten these too much. In the YHM included instructions they don't provide torque specs. This doesn't matter too much so I just attach my barrels per the Marine Corp Tech Manual specifications and some knowledge provided by Midway. This happened to me twice, the first time this happened I thought it was a fluke, the second time I thought it may be the YHM Barrel Nut, just looking for a second opinion here.
My procedure -
Torque to 35 ft-lbs
Loosen
Torque to 35 ft-lbs
Loosen
Torque past 35 ft-lbs until gas holes line up, not past 80 ft-lbs.
If I left the barrel on with the second Torque to 35 ft-lbs, the gas holes are in perfect alignment. When I go past the 35 ft-lbs to 36, the holes is just out of alignment, I increase by 5 ft-lbs until I can get them to align. I got up to 70 ft-lbs and it still wasn't there but am very close so I only increase 1 ft-lb each time and check. The last two I installed hit exactly 78 ft-lbs when I could get the gas holes in alignment. That is 43 ft-lbs of torque past the minimum and 2 from the max. I haven't had this with a standard Colt Barrel nut assembly, just with the YHM barrel nut provided for their free float hand guards and both aligned at 78 ft-lbs (79 or 80) would allow for a better match of the freefloat upper rail the lower's rail but I didn't want to to go any further than was needed.
Your experience and input on this is appreciated.
Thanks,
Cmaro
My procedure -
Torque to 35 ft-lbs
Loosen
Torque to 35 ft-lbs
Loosen
Torque past 35 ft-lbs until gas holes line up, not past 80 ft-lbs.
If I left the barrel on with the second Torque to 35 ft-lbs, the gas holes are in perfect alignment. When I go past the 35 ft-lbs to 36, the holes is just out of alignment, I increase by 5 ft-lbs until I can get them to align. I got up to 70 ft-lbs and it still wasn't there but am very close so I only increase 1 ft-lb each time and check. The last two I installed hit exactly 78 ft-lbs when I could get the gas holes in alignment. That is 43 ft-lbs of torque past the minimum and 2 from the max. I haven't had this with a standard Colt Barrel nut assembly, just with the YHM barrel nut provided for their free float hand guards and both aligned at 78 ft-lbs (79 or 80) would allow for a better match of the freefloat upper rail the lower's rail but I didn't want to to go any further than was needed.
Your experience and input on this is appreciated.
Thanks,
Cmaro