Rifle barrel banana peeled after using potato as suppressor - GIF

[Frank S]

A sound suppressor does not create a blockage in the end of a barrel it directs the flow of supersonic gases into a series of washer like disks allowing the projectile to pass through the hole in the center. The potato on the other hand is going to block the air in front of the bullet which will cause a near instantaneous spike in pressure both in front of and behind the bullet when the weapon is fired