Quick answer

Replacing the lens on your K9 Helm CS1-A2 takes under a minute once you know the release points. Start by flipping the frame over and pressing the two side tabs simultaneously.

Why you might need a replacement lens

Scratches, fogging, or ballistic damage are the main reasons to swap a lens. The K9 Helm CS1-A2 Clear Replacement Lens includes anti-scratch coating and full-spectrum UV400 protection, so you restore both visibility and safety without buying a whole new frame.

Step-by-step lens replacement

  1. 1. Locate the side release tabs: Hold the frame so the lens faces away from you. On each side of the frame you'll see a small tab. These are the only release mechanisms — no tools needed. Common mistake: pressing only one tab. The lens will bind and may crack. Always press both tabs at the same time.
  2. 2. Press both tabs and push the lens out: Use your thumbs to press both tabs inward. While holding them, use your index fingers to push the lens forward from the back. The lens should pop out cleanly. Checkpoint: if the lens sticks, check that both tabs are fully depressed. Never pry with a screwdriver — it will scratch the frame.
  3. 3. Align the new lens and snap it in: Take your new K9 Helm CS1-A2 Clear Replacement Lens and align it with the frame grooves. Start at one side and press evenly around the edge until you hear a click on each side. Common mistake: forcing the lens in upside down. The lens has a slight curve — match the curve to the frame orientation.
  4. 4. Verify the lock: Gently tug the lens from the front. If it stays firm, you're good. If it lifts, press the tabs again and re-seat the lens. Checkpoint: a loose lens can pop out during use. Always test before heading into the field.

Product facts

  • K9 Helm CS1-A2 Clear Replacement Lens: Meets or exceeds US military specifications MIL-PRF-31013 and MIL-V-43511C (test projectile: chisel point, 0.15 caliber @ 750+ fps). When you replace the lens, you keep the same ballistic rating as the original — critical for tactical or training use.

    K9 Helm CS1-A2 Clear Replacement Lens

    K9 Helm CS1-A2 Clear Replacement Lens