Rem Choke 12 Ga. Tactical Ported Extended" Lead Only. CHOKE TUBE 12 GA (EXTENDED PORTED TACTICAL). Designed specifically for the tactical firearm and home defense shotgun equipped with interchangeable Rem Chokes" the tactical choke tube is extended and features multiple ports" a series of jagged teeth" as well as a knurled ring around the body to facilitate faster insertion and removal from the barrel. Aids in reducing muzzle rise for consistent shot placement. Made in USA.