Product DescriptionEngineered for serious waterfowl hunters, the Hevishot HEVI-Choke Waterfowl for Browning Invector-DS shotguns is built to deliver tight, consistent patterns at extended ranges. Machined from aircraft?'grade 17?'4 stainless steel with a durable black finish, this non?'ported, extended range choke features a knurled end for easy hand installation in the field. Optimized to maximize the performance of HEVI?'Shot and other lead?'free loads, it also performs with clean steel and lead shot. Designed specifically for 12-gauge Browning shotguns using the Invector?'DS thread pattern.Product HighlightsExtended Range (ER) waterfowl choke engineered for long?'distance performance12 Gauge Browning Invector?'DS thread pattern compatibilityDurable 17?'4 stainless steel construction with black finishKnurled end allows quick, tool?'free changes in the fieldNon?'ported design tuned for HEVI?'Shot and other non?'toxic loads; works with lead shot as wellMade in the USASpecsProduct Type: Shotgun choke tube (Waterfowl, Extended Range)Gauge: 12 GaugeThread Pattern: Browning Invector?'DSMaterial: 17?'4 stainless steelFinish: BlackPorting: Non?'portedCompatibility: Optimized for HEVI?'Shot loads; also suitable with non?'toxic steel and lead shotCountry of Manufacture: USAUPC: 816383856314Manufacturer Part Number: 85631Brand: HevishotDisclaimer: 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.