I've had one for years, brand is Cation I believe. It works very well with Sabot slugs, very accurate out to 100 yds. At that distance I can keep 3 on a paper plate off hand with a scope. It's a lot cheaper than buying another barrel. If you aren't going to shoot sabot slugs don't bother getting it tho. You will have to bench it to see which brand of slug works best, gets a little pricey to start but once you find the right one stick with it. Mine shoots Win. Supremes the best, but every gun is not the same as we well know. Good Luck with it, sabots are excellentkillers.