Trulock Mossberg 835 Pattern Plus 12 Ga Cylinder. This choke tube by Trulock is much needed when you want to etch a design in your muzzle. The Trulock Pattern Choke Tube was specially designed and crafted by professionals who know exactly what you need and want out of your tools. When you're doing changes on your piece you want to make sure you have exactly what you need; you want to make sure you have Tru Lock Pattern Plus Shotgun Choke Tube. Specifications for Trulock Pattern Plus Shotgun Choke Tube: Manufacturer: Trulock Gun Model: Mossberg Model 835 Package Contents: Trulock Pattern Plus Shotgun Choke Tube Trulock MPP12774: Mossberg 835 Pattern Plus 12 Ga Cylinder