Quick Answer
To test the durability of your red dot sight before use, drop it from 3-4 feet onto a hard surface, such as a concrete slab, and check for any damage or malfunction. You can also subject it to temperature and humidity extremes, and check its performance after 30 minutes at 0°F (-18°C) and 95% relative humidity. Inspect the sight for any signs of water ingress or electrical component failure.
Physical Drop Test
When performing the drop test, make sure to hold the red dot sight securely in your hand, with the objective lens pointing downwards. Release the sight 3-4 feet above the ground and allow it to fall freely onto the hard surface. This will subject the sight to a significant impact, which will help to identify any potential weaknesses in the design or construction. After the drop test, inspect the sight for any signs of damage, such as cracks in the lens or casing, or loose screws.
Environmental Stress Test
In addition to the physical drop test, it’s also a good idea to subject your red dot sight to extreme environmental conditions. This can include temperature extremes, such as 0°F (-18°C) and 95% relative humidity, or exposure to direct sunlight or water. To perform the temperature stress test, place the sight in a sealed container filled with dry ice or a similar cooling agent, and allow it to sit for 30 minutes. Then, quickly remove the sight and check its performance. Repeat this process at the opposite extreme, using a hot water bath or a heat gun to simulate temperatures above 100°F (38°C).
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