Trusted by hunters, adventurers, and shooting enthusiasts worldwide, Marlin’s 336 lever action carbines are the ultimate companions for any shooting experience. Reliable, accurate, and customizable. No matter which Marlin model you choose, XS Sights has the ideal optic mounting solution. Kit Includes: lever rail, front sight, rear sight, apertures (2), screw kit, pillar assembly, blue thread locker, insert with instructions