Adams Arms piston drive + suppressor

[Mobuck]

Is anyone running this combination? Do you find that the adjustment knob gets stiff (hard to move or adjust) due to fouling or oxidation?

 

[2ndchance]

I run several ARs with Adam's Arms adjustable pistons. Yes, fouling will create stiffness. It would be wise to remove the a gas plug assembly and clean it. Don't let it build up too long or it could affect the ball detent. I had the ball get stuck once and the gas plug rotated during suppressed full auto fire and the gas plug shot out, smacking the back of my suppressor and launching 75 yards into the thick desert brush. No fun. Cost me $40 to replace it!

 

[Mobuck]

Update from AA service: Use padded pliers to remove plug, clean, and replace using a CLP type product on the plug. Guess that's what I'll do and try to remember to "adjust" more often to prevent seizing in the hole.