That gun is a 16 gauge Fox. I bought it as is and it was custom upgraded to an XE and restocked by someone else. It fits me perfectly and is one of my favorite upland guns.
I'm particular to Foxes and I also like LC Smith's. Originals are so expensive that these custom upgrades are considered "bargains" if you can find one on the used market. There can be a lot of variation in quality however, so buyer beware.