INCLUDES DIMPLED PIN SET, EXTENDED MAGAZINE CATCH AND EXTENDED SLIDE LOCK PIN SET – Stainless Steel DIMPLED pin set – for easier take down and assembly SLIDE LOCK – Precision machined, not cast, from Stainless Steel. It is then surface treated for improved finish and corrosion resistance EXTENDED MAGAZINE CATCH – 7075 T6 billet aluminum – smooth ramp and extended release pad, designed to improve mag change speed, comfort and efficiency LIFETIME GUARANTEE– We are proud of our work. Our products come with a 100% satisfaction Guarantee you can trust DOES NOT interfere with any holster DESIGNED exclusively for Gen 1-3 models only FITS MODELS: 17, 19, 22, 23, 24, 26, 27, 31, 32, 33, 34, 35, 38 & 39. Does not fit 42, 43, 43x