TK Hero does durability test of the OSIGHT-C dot sight. After receiving explicit and rare permission from the manufacturer, he decided to perform a "forbidden" test: directly shooting the optic's lens with BB rounds to check its strength.

For the test, the host used a Tokyo Marui Glock 17 Gen 5 gas pistol at an extremely close range of 30–40 cm, simulating high energy impact. The lens successfully withstood two direct hits from the BBs without any cracking or breaking, a strong sign of its ruggedness.

Following the impact, the slight surface marks were easily wiped away, confirming the lens was completely intact and undamaged. He concludes that the OSIGHT-C features a very durable lens, making it a robust and viable option for use in airsoft survival games and shooting sports.