I've got a new Mossberg 500 Persuader/Cruiser that I purchased for home defense use by my son. He and his children have moved in with me since my wife died and his apartment is in the basement. I've had an assortment of handguns for security, keying on a Glock 22 (.40S&W) with light/laser and a hi-cap magazine full of Hydro-Shok, but he has an entrance also and needs something to hold his end of the fort with. Since he has vision problems I decided that a shotgun would be the best thing for him to have in his area since precision aiming is not so critical. Of course we've tricked the Mossy out some with a RTI tac-stock/pistol grip and a laser/light/big red-dot combo. We would like to add a pistol grip forearm but have been told that new 500's are unable to have such a change because of the attachment of the action bars. Is this true and are there procedures to get the job done anyway (safely!!!)? It looks nasty now but he thinks a modified forearm would be both nastier and easier for him to pump. Any suggestions?