I HAVE A HASTINGS 12GA EXTENDED SCOPE MOUNT RIFLED BARREL WITH CONTROLLED SABOT DISCARD(CSD)MUZZLEBRAKE.IT REDUCES RECOIL AND MUZZLE JUMP.ITS 24", 1 IN 34" RATE OF TWIST,CANTERLEVER SCOPE MOUNT(FOR NORMAL EYE RELIEF SCOPES),2 3/4--3" CHAMBER,ITS IN NEW CONDITION,IT WAS MOUNTED ON MY SHOTGUN-BUT I NEVER FIRED IT.IT COMES IN ITS ORGINAL BOX WITH PAPERS.IT SELLS FOR $345+SHIPPING FROM MIDWAY USA.I'M SELLING IT FOR $200 TYD-YOU WOUN'T BE DISSAPPOINTED.YOU CAN EMAIL ME DIRECT WITH ANY QUESTIONS AT:[email protected] THANK YOU FOR INQUIRING,SLUGNUT