Teslong NTG100H-C Borescope

Yes, the probe diameter is 5.0 mm, which is approximately 0.197 inches. This allows it to fit comfortably into most .22 caliber barrels and larger.

No, the device connects directly to your smartphone, tablet, or computer using the included USB-C, USB-A, and Micro-USB adapters. You will use your device's screen to view and record the inspection.

The kit includes six screw-on side-view mirrors that attach to the end of the probe. These allow you to view the rifling lands and grooves at a 90-degree angle, which is essential for spotting fouling or pitting that you might miss with a straight-on view.

The probe is rigid, made from stainless steel. This rigidity is intentional, as it makes it much easier to guide the camera down a rifle barrel without the probe bending or curling, which can happen with flexible fiber-optic cables.

Yes, the device supports both photo and video recording through the compatible software on your connected smartphone or computer. This is useful for documenting the condition of a barrel over time or sharing findings.

The markings allow you to track exactly how far the probe has traveled into the barrel. This helps you pinpoint the specific location of any fouling, erosion, or tool marks you discover during your inspection.