Tisas PX-5.7 Optics Ready Features: Tactical trigger with integrated trigger safety Proprietary 20-round steel magazine with black baseplate. Integrated Picatinny rail Reversible magazine catch Polymer frame Adjustable rear sight Fiber optic front sight Loaded chamber Indicator and striker status indicatorSpecifications: Caliber: 5.7x28mm Barrel Length: 4.8 Inches Weight (With Mag.): 24.96 ounces Overall Length: 8.65 inches Height: 5.55 inches Trigger: Single action Trigger Pull: 4.18 +/- 0.22 pounds Two 20-round magazines