Look at item no. 100887974 on Guns Intl. Anyone recognize who did the inside the trigger guard release? I have a rifle with the exact same bottom metal.

Tom,

That appears to be somewhat like a modified FN/Browning Safari grade bottom metal with a thumb button added. Strictly custom done. Don't have a clue who did it

I have seen pictures of old Dale Goens custom rifles with that type of trigger guard and some very early Biesens.

Burgess made such conversions, probably others