Model: AC-12 Carbon, AC-12, CL-SP, and CL-15
1. Ensure that the handle-locker is in the open position.
2. Align and insert the top of the shield guide into the plate-gear guide.
3. With the guides properly aligned, press the lower section of the shield into the Plate-Gr mechanism. The locking tab should pop into position, locking the shield into place.