I WOULD OPT FOR THE MUCH IMPROVED M590 A-1, WITH THE GHOST RING SIGHT. I HAVE HAD EXPERIENCE WITH GHOST RING SIGHTS ON SEVERAL WEAPONS, INCLUDING SHOTGUNS, AND A MARLIN GUIDE GUN IN .45-70 GOVERNMENT. IN EACH INSTANCE THEY WERE AN IMPROVEMENT, OVER WHAT THEY REPLACED.......
THERE APPEARS TO BE MANY OPTIONS AVAILABLE, SO THAT YOU COULD ASSEMBLE A WEAPON THAT WOULD EXACTLY SUIT YOUR PURPOSE. I WOULD STRONGLY SUGGEST THAT YOU BE COGNIZANT OF FEDERAL LAWS, AND LAWS IN YOUR JURISDICTION, THAT SPELL OUT SPECS AND LIMITATIONS THAT MUST BE ADHERED TO, DO NOT BUILD A SHOTGUN THAT IS CLEARLY ILLEGAL ! ! !
FOR INSTANCE---DESPITE THE FACT THAT MOSSBERG OFFERS A 14" BARREL---A CIVILIAN IS PROHIBITED FROM OWNING A SHOTGUN WITH A BARREL SHORTER THAN 18", AND AN OVERALL LENGTH SHORTER THAN 26", UNDER THE "NATIONAL FIREARMS ACT".....
IMHO, A BAYONET LUG IS A USELESS FEATURE THAT WILL COST MONEY, AND MUST BE CHECKED FOR COMPLIANCE WITH STATE AND LOCAL LAWS. IT MAY RED FLAG YOUR SHOTGUN AS AN "ASSAULT WEAPON", CAUSING YOU LEGAL PROBLEMS. I HAVE HAD SEVERAL SHOTGUN BARRELS PORTED BY MY GUNSMITH. I FOUND THAT TO BE A WORTHWHILE MOD......
SO, MY POINT IS CHECK THE APPLICABLE LAWS, THEN PICK THE FEATURES THAT WILL SUIT YOUR PURPOSE. MOST OF ALL, ENJOY THE EXCITEMENT OF THIS PROCESS, AND THE RECEIPT OF YOUR NEW PERSONALIZED SHOTGUN......
STAY SAFE, AND BEST WISHES.......