Wait, you are concerned with adjustable gas block moving... I get that.
But you are also concerned with adjustable gas blocks NOT moving? Why?
For a set and forget adjustable gas block, I only reccomend the Superlative Arms in restrictive mode. You set by shooting unsuppressed. Shoot with the weakest ammo you will normally shoot. For me it is .223 55 grain FMJ. Load one round at a time. Shoot and see if the bolt locks back on that last round. If not, open 1 click. Continue until it locks back and load the magazine with multiple rounds (2or 3). If it cycles and locks back, check with any other magazine and 55 grain brass cased available to be certain it locks back 100% of the time.
Here is the important part... STOP! Do NOT add an extra click for "reliability" purposes. Recoil spring and gun wear/break in covers that. 5.56 pressure or heavier grain ammo covers that. Now your suppressed use will be as overgassed as little as possible but be 100% reliable unsuppressed. It will be WAY more comfortable to shoot suppressed once propperly gassed.
If you shoot really weak steel cased or run a VERY dirty gun with .223 55 grain, it MAY fail to lock back on the last round unsuppressed, when dirty but it will CYCLE 100% no problem. It will just let you know its time to clean. You WONT have issues locking back with 5.56 pressure ammo. You ABSOLUTELY wont have issues locking back EVER suppressed. Best to do this tuning indoors or in cooler weather, not in blazing sun during summer to keep cold weather from being a concern.
So the gas setting may freeze up over time? Who cares? Carbon lock would just be added reliability to ensure the setting does not move. SA gas blocks do not have that issue though... and it has positive click detents. It won't walk. Ever.
To remove the SLIGHTLY overgased when suppressed issue, you can use a lower back pressure silencer, so there is less difference in suppressed vs unsuppressed, or use a Rifle Speed gas block to tune to a different setting for suppressed use... set just as above with 55 grain .223 ammo.
Charging handles don't do jack. I have tried them all. The vents just let more low velocity smoke seep out the receiver into your face.
If you have high velocity gas, your bolt is opening way too early. You need to solve that by cutting gas. You can add mass, but the 5.56 AR with carbine or midlength gas port lengths are more gas dependent than mass dependent. Consider this... if you tune with a 3oz buffer, you will have the same setting to lock back with H1 or H2 buffers in my experience and only occasionally will an H3 buffer fail to lock on that same setting. A lightweight carrier is only one or two clicks difference from full mass. This is why you should NEVER add a click for "reliability" when tuning. You are just undoing most of the improvements by going to that next click. Add two clicks and you might as well not use an adjustable gas block at all.
The restrictive gas tubes are at least twice as coarse of settings vs. the less fine tuned adjustable gas blocks like the Superlative. THAT is why I am not a fan of the gas restrictive gas tubes. A bandaid fix when you can tune much more effectively with a block and the block does not have reliability issues.