Zerodown explained: Did you materialize to acquire any concerns putting the forearm on through the Knoxx stock? After i put it on my 500a, the forearm was an absolute bitch to get on. Couldn't even place the nut back on as there is no area. Interested to view for those https://highimpactrounds.com/product/mossberg-590a1-spx-12-ga-20in-8rd/