Jebs Choke Tubes Upland and Windshooting 12 Gauge Choke Tube New Browning A-5 DS System .685 Modified Upland Tube Matte Stainless JPC - 12I2/685. Manufactured from aircraft quality 17-4 heat treated stainless steel to withstand long life and tough recoil. These choke tubes feature a one full band constriction which will produce the optimum amount of back-face hold on the dove. Stocked choke tubes are not returnable. After initial break-in period use JEBS choke tubes with proper choke tube constriction number and barrel bore constriction flush mounted. Never fire a gun with a choke tube that is not the proper choke tube for the shotgun brand and model you have. Clear choke tubes display constriction lettering on the body. Black choke tubes display color coding on the body. JEBS choke tubes that are properly matched to the Browning A-5 DS system are warranted for 12 months from date of manufacture. Please allow 6 weeks for the first choke tube to fully seat and stabilize. Half-moon choke tubes require barrel modification for installation. Specifications for Jebs Choke Tubes Upland and Windshooting 12 Gauge New Browning A-5 DS System Choke Tube: Manufacturer: Jebs Choke Tubes Finish: Matte Fabric/Material: 17-4 Heat Treated Stainless Steel Gauge: 12 Gun Make: Browning Gun Model: Browning Auto-5 Package Contents: Jebs Choke Tubes Upland and Windshooting 12 Gauge New Browning A-5 DS System Choke Tube Jebs Choke Tubes JPC - 12I2/685: 12 Gauge New Browning A-5 DS System .685 Modified Upland Tube Matte Stainless