The Rob Roberts Gun Works 200289 TSS Raptor Invector 20 Gauge 17-4 PH Stainless Steel delivers advanced performance for wing shooting with its TSS choke precision engineered to pair with premium tungsten shot, providing optimum patterns and consistency across shots. Built from 17-4 PH U.S. Stainless Steel, this choke tube represents years of development and innovation, designed to withstand demanding field use while delivering durable, repeatable results. As a strong addition to the RRaptor Series, the Raptor Invector choke blends reliable construction with high-accuracy threading to ensure a secure fit and predictable performance. Note that over-shotguns can have a RRaptor choke in only one barrel, and the design does not allow for placement in both barrels, a consideration that helps shooters tailor their setup to specific hunting scenarios. Use with a 20 gauge platform to maximize the effectiveness of tungsten loads, achieving tighter, more uniform patterns that translate to cleaner breaks and higher hit probability on fast-moving targets. With its stainless composition and purpose-built compatibility, this choke tube offers a focused, professional-grade upgrade for serious upland and waterfowl enthusiasts seeking reliable, field-ready performance.