Building on the success of our GSR-01 through-03 Slide Rackers, we now offer the GSR-04 for all currently released sub compact, compact and full size GlockA(R) Gen 5 pistols. All of the features pioneered in the initial GSR- line, continue on for Glock'sA(R) latest Generation of pistol perfection. The GSR-04 is a top quality drop-in part, requiring no other modifications to the firearm. Injection molded of glass-reinforced nylon with stainless steel reinforcement just like the OEM part, it will NOT damage your Firing Pin Spacer Sleeve like many aftermarket aluminum retention plates. Once in place, the GSR-04 offers easy, effortless and positive slide cycling under any condition. a Tough, stainless steel & injection molded glass reinforced nylon construction a Subtle, extended 'Wing' shape with serrations makes for easy slide cycling, even under 'Tap/Rack' stress a Installs in minutes, without any weapon modifications a .22LR, 9mm only Fits most GlockA(R) models with 1.00 slide widthFits Gen5 GlockA(R) 17, 19, 19X, 26, 34, 44, 45, 47, 49