Slide Integrated Expansion Chamber with 3.7 Barrel – Aggressive FUSE Slide Serrations – Optic-Ready (SIG-LOCTM Compact Footprint) – Polymer Grip Module with 1913 Accessory Rail – Interchangeable Small Medium and Large Backstrap Included – X-RAY 3 Day/Night Sights – (1) 17rd (2) 21rd – CALIBER 9MM – FRAME MATERIAL STAINLESS STEEL – GRIP MODULE POLYMER – SLIDE MATERIAL STAINLESS STEEL – SLIDE FINISH NITRON – MAGAZINE CAPACITY 1721 ROUNDS – SIGHTS X-RAY3 DAY/NIGHT SIGHTS – TRIGGER FLAT-FACED STRIKER FIRED – OVERALL LENGTH 7.2 in – OVERALL HEIGHT 5.2 in – OVERALL WIDTH 1.4 in – BARREL LENGTH 3.7 in – SIGHT RADIUS 5.5 in – WEIGHT W/MAGAZINE 22.9 oz