Originally Posted by
pinzgauer
Bill Alexander has indicated in the past that while it is not *needed*, he has seen some benefit in using locktite on the barrel extension for grendels. It reduces some of the harmonics that can cause vertical stringing without having to over torque the barrel nut like some bench shooters do.
He was very clear that in any single rifle you may not see a benefit. Remember, grendels are normally sub-moa even with carbine rack grade barrels and half MOA is not uncommon with some care and decent ammo. So the grendel crowd is more accuracy oriented. Bill recommends 243, and it handles the heat in the receiver sections with no problem, yet can still be removed if needed.
For a typical hard use 5.56 carbine I personally do not believe you would see a benefit.
If you feel the need to do something on the gas block or hider, many use Rockset, which can handle the higher temps. I personally do not believe it's needed on a properly assembled m4'gery.
Of course, if you are concerned about the sight block most will tell you you should pin it, so the only benefit to "bedding" is for gas seal, which should not be an issue with decent components.