The 
NUPROL NP 40mm Killflash
 is an airsoft optic accessory designed to protect your scope from BB impacts and reduce lens glare. It features a honeycomb structure and is designed to screw directly onto the objective lens of compatible 40mm optics. 
 
 
Product Details and Features
Optic Protection: The primary function is to provide a resilient barrier against incoming airsoft BBs, preventing costly damage to your optic's lens.
Glare Reduction: The unique honeycomb structure minimizes the amount of light entering the optic from various angles, which reduces lens glare and improves visual clarity, especially in bright, sunny conditions.
Compatibility: It is specifically engineered to fit optics with a 40mm objective lens. It screws directly onto the existing threading of the scope.
Material: The product features a durable finish suited for regular field use.
Ease of Use: It is designed for simple, effortless installation by screwing it on and off the optic.