18 inch, I took this to the range and got 8 out of 20 clays with it, I would have been happy with 2 out of 20. I like this stock, it slides. It is adjustabel so short arms, long arms, whatever. My left arm has been broken twice and the grip isn't as good so this with the pistol grip works great for me. I have seen all of this stuff on the Mossberg site.
In Alaska everyone had a Remington with a folding stock but I got what I thought was a good deal on this and it's fine.
