Made for the 40 Smith & Wesson cartridge, this magazine fits the Sig P229 and is finished with anti-friction coating that allows for easy of loading and anti-corrosion.Feature: Increased capacity to 14-rounds with Plus-2 adapterOnly 5/8 inches longer than flush-fit magazinesRedesigned tube to improve functionality, heat-treated for strengthAnti-Friction coating allows for easy loading and superior anti-corrosion propertiesInterlinked internal components