I don't know if barrel flex or handguard flex is causing the contact between the gas block and the handguard. I suspect it is the handguard.
Maybe the vibration occurs after the bullet has departed.
But this obviously would contribute nothing to accuracy.
It would be interesting to mill a slot in the handguard so that the gas block cannot make contact, and retest for accuracy. This would be a simple modification to a lower cost component that would eliminate one variable.
Maybe the vibration occurs after the bullet has departed.
But this obviously would contribute nothing to accuracy.
It would be interesting to mill a slot in the handguard so that the gas block cannot make contact, and retest for accuracy. This would be a simple modification to a lower cost component that would eliminate one variable.