Well she has a huma regulator installed to stay consistent in shot string and add better shot count.. the nislen 17gr slugs are super accurate with the .2165 diameter. Fx hybrid slugs will go in tightly but will shave lead off the slug! Now to make it short like the picture shows is Tony custom work with koi added with adaptor. Give Tony a call and he will give you all the details. I will say this Tony has answered every call and text to bring her all together. When I opened my box man Tony and his staff put tons of goodies in there. Well worth the buy..