Quote Originally Posted by ray1970 View Post
Fuzzy on the details but I think Mossberg has used different length pump tubes over the years. Something like a five inch and maybe a five and a half or something? Not sure if maybe your wood and the tube where it mounts are maybe incompatible?

Beyond that, I?ve got nothing.
You are on the right track, but I can’t remember the lengths or the years of the differences.
To the OP, take both foregrips and do a side by side comparison, then you will see the differences.