GD & T Call Out, need help

What does this call out mean. The part is GD& T.

Specifically, the symbol, and the (.38). To the best of my knowledge the CHEVERON is a sideways angular call out, but what is with the underscore and the circle on the line? I really have no idea what this means.

Many thanks in advance!
Sean

Its not a GD&T callout...
it is a weld symbol, vee weld with level top... the o is to weld all around the joint

Thank you for the information!! I thought I was loosing my mind. I am going to print out a weld symbol chart, LOL.