The Fab Defense 43-10 is a magazine floor-plate replacement for the Glock 43 that adds 4 rounds for a total of 10 rounds in a magazine. Special ergonomic design enables secure manipulation of the magazine and a full grip on the weapon when the magazine is in use.+ 4 rounds for a total of 10 rounds in the magazine!Innovative spring plate design, allows for the use of the original magazine springEnables a full grip on the handgunContoured finger indents for a firm grip during magazine manipulationFiberglass reinforced polymer construction