9mm Luger caliber; Full size frame (Compatible with G17 holsters); Optic Cut Optional - Optic cut with direct mount for most optic brands; Elite models feature the patent-pending multi-footprint optic cut; Drop Safe, flat-faced trigger with 4.5-5.0 lbs trigger pull; Directional slide serrations for confident manipulation; Interchangeable backstraps to fit NPOA; Aggressive grip texture; Striker fire action; 17+1 round capacity