Free: Contests & Raffles.
RIFLED REM™ CHOKE TUBES• Adds rifling to smooth bore barrels equipped for Rem™ Chokes • Adds rotational stability to Foster-type and sabot slugs as they exit the muzzle• Improves accuracy and shot placement • Available in 12-gauge only
Yep, nothing more manly than tossing that mangy flea infested urine dripping and bloody dog over your neck and packing him out that way...
I think a choke tube in Improved Cylinder would be fine as well, but I guess it would be best to check with Remington or read the owner's manual to be sure.