MOST Brownings have inertia triggers. I learned a long time ago not to say all, always or never, cause it can come back to bite you.
Most can be converted, but unless you have a 12 ga with 410 tubes, it may not be worth it. I do not know the cost, but I can't imagine it being very cheap.
By the way, I'm from Georgia. I just happen to live in Colorado.
Drink some sweet tea for me.
Thanks,
Lee