Browning Gold - Tactical options?

[Deadduck]

I have a Browning Gold 3.5 that I use for duck hunting. I've had very good luck with it over about 7 years of pretty hard running.
I'd like to put a mag extension and short barrel on it for playing and home defense, and then be able to put it back to original configuation for hunting season. Are there any extensions etc available?
I think it's pretty much the same gun as the Winchester Super X2.