Two 17 round mags.

Hi Christopher, it normally comes with (2) 17rd magazines, I cannot find any info on whether the LE model includes an extra magazine or not. It does come with 4 adapter plates (RMR, Venom, Delta Point and Romeo1).
Stay safe & have a great day!

This model includes (2)-17 round magazines. Much more info on this model below.
sportsmans.com/shooting-gear-gun-supplies/handguns/iwi-masada-9mm-luger-41in-flat-dark-earth-pistol-171-rounds/p/1761684?srsltid=AfmBOopw6TMzt-m6Wq6eRG1XIAhH9rHPElllGRdloRuFViF2MtCaYbN5

Hi Christopher and welcome. The IWI Masada (Hebrew: מצדה, "fortress") is a semi-automatic, striker-fired and recoil-operated pistol developed and produced by Israel Weapon Industries in Kiryat Gat, Israel. It is imported into the US. Cheers and stay safe!