I have one of those Mossbergs and it is a very handy little rifle, but it isn't stainless, rather it is CM with a gray coating that looks like brushed stainless. The following is a description quoted from an on-line ad.
"The Mossberg 41050 Model 464 Brush Gun Lever Action Rifle in .30-30 features a 16.25-inch button rifled barrel, marinecote stainless steel finish, drilled and tapped receiver, checkered pistol grip gray laminate stock, Williams fiber optic fire sights, black rubber buttpad, recessed muzzle crown, an overall length of 34.75 inches, an unloaded weight of 6 lbs, and a 5 1 round capacity. All backed by Davidson’s Lifetime Guarantee!"