Trulock American Arms Precision Hunter 12 Ga Extra Full Ported. These Choke Tubes by Trulock have a black anodized finish and are made from high strength 17-4 stainless steel. This Trulock Precision Hunter Shotgun Choke Tube features an Extended Length and a Nitride QPQ Coated finish which gives these choke tubes a great look that is perfect for your weapon. With this choke tube fitted in your shotgun you can ensure you are putting the utmost precision on the range. Boost your shotgun's performance by installing a Trulock Precision Hunter Shotgun Choke Tube - American Arms. Specifications for Trulock Precision Hunter Shotgun Choke Tube - American Arms: Manufacturer: Trulock Color: Black Finish: Black Fabric/Material: 17-4 Stainless Steel Gun Make: North American Arms Quantity: 1 Package Contents: Trulock Precision Hunter Shotgun Choke Tube - American Arms Trulock PHAA12685P: American Arms Precision Hunter 12 Ga Extra Full Ported