Hi Pierre, Do you have a LCP l or LCP ll Model? The standard magazine base plate leaves your pinkie floating in the air making the LCP difficult to hold firmly. These easy to install extensions gives your little finger at least some kind of resting place (although behind the extension point rather than in front) I would go with the grip extension if you have the LCP l. The LCP 7 round magazine won't fit the LCP II.

The only "gotcha" is the 7rd extended LCP mag won't fit the LCP II. Other than that, i would get the magazine with the extension already installed to save a little money over buying them separately.