Re: browning A-5 Mag.
Hi Adam....sounds like what you have is the Auto-5 Stalker, made in Japan by Miroku. It was made in 12ga. only, had various length Invector barrels (up to 30 in.) and a black matte graphite-fibreglass stock & forearm and matte finish metal.
Looks like you got a little bit of a deal.....Blue Book value:
95% - $525
90% - $465
80% - $415