Searvhing for knowledge, basic question

[hillbilly]

I just want to make sure I understand something.

Bloop tubes, or barrel extensions for air rifles, serve a specific function.

That function would be to elongate the sight radius of an air rifle, right?

Bloop Tubes really don't affect velocity, do they?

Thanks for enlightening me.

hillbilly

[Lee Sellers]

They extend the sight radius only.