The KHX Custom/RL (OI) has a milled slide that has a Holosun HE507C-GR-X2 optic installed. Equipped with 1913 Picatinney accessory rail & Stiplex front strap stippling for extra grip confidence. - Specifications - Height (inches) 90 to barrel: 5.25 - Weight (ounces) with empty magazine: 39 - Length (inches): 8.7 - Magazine capacity: 8 - Recoil spring (pounds): 16.0 - Full-length guide rod - Frame - Material: Stainless Steel - Finish: Gray KimPro II - Width (inches): 1.28 - Slide - Material: Stainless Steel - Finish: Gray KimPro II - Front serrations - Barrel - Length (inches): 5 - Material: Stainless Steel match grade - Stainless steel match grade bushing - Twist rate (left hand): 16 - Sights - Holosun HE507C-GR-X2 optic installed - Grips - Hogue Magrip G-10 Mag Grip - Trigger - Premium aluminum - Factory setting (approximate pounds): 4.0-5.0