Product DescriptionDesigned for hunters who rely on bismuth shot, the Rob Roberts RRaptor Biz choke tube delivers tight, consistent patterns in 20 gauge shotguns with Invector threading. Built from durable 17-4 PH U.S. stainless steel and engineered through years of development, this choke is a strong addition to the RRaptor Series. For over-under shotguns, only one barrel can accept an RRaptor choke due to its design.Product HighlightsOptimized specifically for bismuth shot performancePrecision-machined from 17-4 PH stainless steel for strength and corrosion resistanceFits Invector-configured 20 gauge shotgunsPart of the proven RRaptor Series for reliable pattern consistencyEasy installation and removal for quick field or range changesSpecsProduct Type: Shotgun choke tubeGauge: 20 GaugeChoke Configuration: InvectorSeries: RaptorModel: BizMaterial: 17-4 PH Stainless SteelDimensions (packaging): 7.0 x 3.9 x 1.2 inWeight: 0.135 lbUPC: 810174901993Manufacturer Part Number: 200290Brand: Johnny StewartDisclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.