Bruniton is not a stainless finish, it's black. I would surmise the barrel is perhaps a stainless barrel from Beretta or an after market barrel which replaced the original. Is the slide stainless as well? If not, I would think the barrel was replaced for a stainless by a previous owner. I've just never seen or heard of Beretta manufacturing pistols w/ a Bruniton slide w/ a stainless steel barrel. Only speculation. I own a 92G police special and it's blued.