Its not marked stainless steel. Do you know the difference in the stainless vs non stainless model besides the material its made from? This choke is 3-4 years old and i purchased it new myself. Only has about ten shots through it. As much as i loved the sx2 i had it in, i just wasn't fond of the long barrel in the thick stuff so i mostly used my other guns occasionly carrying this gun a day or two in more open woods or fields. I'm just curious since most want the stainless version. Wouldnt think the performance would be any different. I would trade for the kicks if you decide you want it.