Hi Christopher and welcome. Only (1) adapter plate is included. The multiple backstrap frame allows the users to change the circumference of the grip to fit their individual hand size. MOS features a slide that is precision machined to provide a mounting system for popular optic sights. With multiple adapter plates (sold separately), you can quickly and easily mount miniature red dot sights. Includes one adapter plate, three magazines, mag loader, cleaning kit, pistol case and gun lock. Cheers, stay safe and enjoy!

This model will include (1) adapter plate.