Nice adjustable gas block - Kaw Valley Precision AR-15 Adjustable Gas Block

Purchased this adjustable gas block for my most recent build. The product is very nicely machined and doesn't require a roll pin for the gas tube. It comes with a screw in retaining pin for the gas tube, very nice. This feature ensures there will be no punch marks left on the block. The one thing about this gas block that left me a bit confused is there is no set screw to lock down the gas adjustment screw. Does KAW Valley really think the gas adjustment screw won't change position once set? Seems to me the vibration caused by the rifle's recoil would cause the adjustment screw to walk.