Glock Inc. Glock Factory Original Magazine Catch Reversible Extended Fits 9mm Luger|.40|.357 Gen4/Gen5 PACKAGED MSRP: Was: Now: $6.99 Extended +0.75Fits: 9mm .40 .357 Gen4/Gen5(Excludes G19X/Slimline - G36 G36FGR G42 G43 G43X G48)