This is exactly the right barrel for my shotgun, except some mention of modifications left out - Winchester SXP Field Shotgun Barrel

It fits perfectly. However, it should be mentioned that a 3+1 magazine is need for this barrel and I have a 4+1 and having some difficulty getting the former. The reason, I believe the difference in where the mounting ring, retainer ring or barrel support is located on my 18 inch barrel as to where it is on my just purchased 26 inch barrel is what is require for the way the barrel flexes as to the pressure wave behind the projectiles. I do think that certain mention of this may be made as to the particular model of the 12 gauge Winchester SXP shotgun.