I have the same exact gun and yes you can shoot slugs just make sure the 0 choke is in that it came with. Rifled slugs only!
"The spirit of resistance to government is so valuable on certain occasions that I wish it to be always kept alive. It will often be exercised when wrong, but better so than not to be exercised at all." ~Thomas Jefferson
You can with no problems. People say tighter chokes are bad to use with them but I've shot a ton out of my maverick with a modified choke. Keep in mind, if your barrel is rifled dont use rifled slugs, if your barrel is cylinder bore, use rifled slugs. One of the two (barrel or slug) needs to be rifled. Not both, not neither.