Introducing the Reptilia Black Hole(TM) Polymer Magwell for GLOCKA(R) pistols. Molded from reinforced polymer, the Black Hole's enlarged magazine well opening helps facilitate more efficient reloads without adding unnecessary bulk to your carry or duty sidearm. Compatible with GLOCK 19 pistols, the Black Hole utilizes a unique rear spacer to ensure seamless fit and compatibility with both Gen 3 & Gen 4 frames. Available immediately for GLOCK 19. Note: Not compatible with 10 round factory Glock magazines but is compatible with MagpulA(R) 10 round magazines.