Hey all, I'm trying to use a Wilson Combat adjustable gas block inside an Aero Precision COP upper receiver.

The Wilson block is taller and slightly wider than a standard low-profile block because of the adjustment screw.

The fit is super tight. Even after chamfering the (oddly) square corners on the top of the Wilson gas block, there is maybe 1/16" clearance from the top and sides of the rail interior.

I am using a very high quality 416 stainless 16" barrel with a medium contour. The COP rail is extremely stout.

My concern is that the gas block will hit the inside of the rail when a shot is fired.

How much does a barrel move inside the handguard when a shot is fired? Anyone have a link to some slow motion footage of an AR being fired in controlled conditions (i.e. mounted firmly to a stationary object)?