.22 LR autoloading pistol with precision machined alloy frame. 5.9" matte blued bull barrel with 1/2"-28 suppressor ready threads. Co-witnessing fiber-optic front sight and windage adjustable rear sight. Vortex Crossfire Red Dot Sight. This model includes a Vortex(R) Crossfire red dot sight, perfect for faster target acquisition and accuracy. The low red dot mount allows the sights to co-witness through the red dot sight. Co-witnessed sights means that the iron sights and red dot point of aim are in alignment, giving you backup sights should the red dot fail. This is useful if the battery in the red dot gives out or the red dot fails for another reason, and also if you remove the red dot it can quickly be re-zeroed using the iron sights without sighting-in again.