Trulock Ruger Precision Hunter 12 Ga Extra Full. This Shotgun Choke by the experts at Trulock is constructed of high strength 17-4 stainless steel for years of reliable use. The TRU-DRG4 Precision Hunter Ruger 12 Gauge Shotgun Choke Tube System allows you to keep your shotgun choked for an extremely long period of time even while you are at the range. For a great way to make sure you are using some of the most effective chokes on the market choose the Trulock 12 Gauge Precision Hunter Ruger Shotgun Choke Tube System. Specifications for Trulock Precision Hunter Shotgun Choke Tube - Ruger: Manufacturer: Trulock Finish: Black Fabric/Material: 17-4 Stainless Steel Gauge: 12 Gun Make: Ruger Package Contents: Trulock Precision Hunter Shotgun Choke Tube Trulock PHRU12705: Ruger Precision Hunter 12 Ga Extra Full