Laylax demonstrates the benefit of using the Krytac KRISS Vector GBB Bolt Stroke Adjuster made under the First Factory brand. This product optimizes the KRYTAC KRISS VECTOR gas blowback by adjusting the bolt stroke. By fine-tuning the bolt stroke based on gas pressure and temperature, you can eliminate malfunctions, feeding issues, and enhance overall performance. This part also allows for customization of recoil shock, elevating your enjoyment of the KRYTAC KRISS VECTOR. To adjust, turn the top of the adjuster to your desired height (closer to the base increases stroke, farther decreases, but keep distance under 2mm). Once set, tighten the hexagon socket set screw securely but avoid overtightening.