An extension for the GLOCK 42 (.380 cal). This extension replaces the magazine floor plate adding approximately 3/4" additional length resulting in better control and comfort without altering the capacity of the factory magazine. This product will not fit the Glock 43. FeaturesDirect factory replacementAdds additional gripping surfaceDoes NOT alter factory mag capacity DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.