Beretta Choke Tube OptimaChoke HP +2in 12 Ga Black Extra Full. The Beretta Optimachoke HP 2" Extended Choke Tube is manufactured from high strength steel and finished in a nickel-alloy coating to guarantee significant corrosion resistance and to withstand the rigors of steel shot. Optima-Choke HP tubes are fully interchangeable on all Beretta barrels that are threaded for Optima-Choke HP. WARNING: Use of the Beretta 2" Extended Optima HP Choke Tube in an Optima firearm (without the HP designation) can cause severe damage to the choke tube and barrel when the shotgun is fired. Only use Optima HP choke tubes in these Optima HP shotguns: SV10 Perennia SV10 Prevail A400 Xplor and UGB25 Sporting. Specifications for Beretta OptimaChoke HP +2in 12GA Choke Tube: Manufacturer: Beretta Color: Black Fabric/Material: Steel Gauge: 12 Choke Tube System: Beretta Optima HP Gun Make: Beretta Quantity: 1 Condition: New Package Contents: Beretta OptimaChoke HP +2in 12GA Choke Tube Beretta C62269: Choke Tube OptimaChoke HP +2in 12 Ga Black Extra Full