Thanks for this. I bought a 1301 Tactical yesterday that came with the same extended, threaded choke tube. After getting transferred to the right department at Beretta USA (extension 2003 for future reference), the man I talked to explained that a batch of guns were mistakenly equipped with what he referred to as a law enforcement choke tube, designed to facilitate the addition of a muzzle break. He volunteered to send me a flush-fit cylinder bore choke tube at no cost. I supplied my name and address. I'll report back when it arrives.