Missing Bead under Trak Lock?

[Rfn]

I just noticed that my 870 barrel is missing the bead front sight under the Trak Lock. Is this a problem? Could it vent gas up and pop my sight off? Should I fill it? With what? Thanks.

 

[geologist]

My gunsmith removed the bead from my HP9-1 before installing my Trac Locs. After maybe 600-700 rounds it's doing just fine.