Inspect your barrels with a clear, repeatable image. The TESLONG NTG500 combines a 45″ flexible probe (≈ 114.3 cm) with a standalone 5″ IPS screen, with no app or phone required. Its Ø 0.2″ (≈ 5.08 mm) camera head fits .22 caliber barrels and above, with interchangeable side-view mirrors to examine rifling, throat erosion, pitting, and fouling. 1080p photo capture and 720p video recording to a 32 GB card, 6 adjustable LEDs, 70° FOV, 0.4–0.6″ DOF (≈ 10–15 mm): you can see exactly what your cleaning is doing — and what needs to be corrected. The IP67 probe (with rugged monitor) combined with a 3500 mAh battery (≈ 5 hours) makes it a robust and practical tool both on the range and in the workshop.
 

 
Use / positioning
Standalone borescope for barrel diagnostics: cleanliness checks, verification of solvent/brush effectiveness, identification of wear (fire-cracking, pitting, damaged rifling), and inspection of the chamber and throat. Operates without a smartphone, making it ideal for the range, gunsmithing, or training.
 
Key benefits
Standalone: integrated 5″ IPS screen (≈ 12.7 cm), no app required.
 
Readable precision: 1920×1080 photo, 1280×720 video, 70° FOV, 0.4–0.6″ DOF (≈ 10–15 mm).
 
Slim probe: Ø 0.2″ (≈ 5.08 mm) for .22 caliber and above, 45″ (≈ 114.3 cm) long to reach the full barrel length.
 
Interchangeable side-view mirrors: wall inspection, with the option to remove the mirror to point toward the firing pin.
 
Lighting: 6 adjustable high-intensity LEDs.
 
Endurance: 3500 mAh battery (≈ 5 hours of use recommended between 0–45 °C), 32 GB microSD card, built-in microphone and speaker.
 
Durability: IP67-rated probe (limited immersion), reinforced monitor.
 
Interoperability: interchangeable probes within the NTG range; USB output for larger display (PC).
 

 
Technical specifications
Screen: 5″ IPS (≈ 12.7 cm), 854×480 px (tempered glass).
 
Probe: flexible steel, 45″ (≈ 114.3 cm), Ø 0.2″ (≈ 5.08 mm).
 
Image: 1920×1080 photo, 1280×720 video, 1.0 MP sensor.
 
Optics: 70° FOV, fixed focus 0.4–0.6″ (≈ 10–15 mm).
 
Lighting: 6 adjustable LEDs.
 
Power supply: 3500 mAh Li-ion battery, typical battery life ≈ 5 hours (0–45 °C).
 
Storage: 32 GB microSD (pre-installed).
 
Protection rating: IP67 probe (immersion 1 m / 30 min), IP45 monitor (comparison chart).
 
Connectivity: USB-A/Micro/USB-C ↔ aviation cable, USB-C charging.
 

 
Compatibility & integration
Supported calibers (with the appropriate mirror): .22 (≈ 5.6 mm), .243 (≈ 6.2 mm), .30 (≈ 7.62 mm), .38 (≈ 9.65 mm), .40 (≈ 10.16 mm), and above.
 
Recommended use: chamber entry with a suitable bore guide; remove the mirror for firing pin / bolt inspection.
 
Interoperability: interchangeable NTG probes; PC viewing via USB if needed.
 

 
Care & usage recommendations
Clean the mirrors and lens with a microfiber cloth; avoid aggressive solvents.
 
Do not immerse the monitor; respect the IP67 rating of the probe.
 
For best sharpness, maintain a 10–15 mm distance (DOF) and adjust LED intensity.
 

 
Contents & notes
Contents: monitor, 45″ probe, 5 mirrors (.22/.243/.30/.38/.40), 32 GB microSD, USB-A/Micro/USB-C ↔ aviation cable, USB-C cable (charging).
 
45″ probe (≈ 114.3 cm) Ø 0.2″ (≈ 5.08 mm); 5″ IPS screen (≈ 12.7 cm); 1080p photo / 720p video; 70° FOV; 0.4–0.6″ DOF (≈ 10–15 mm); 6 LEDs; 3500 mAh; IP67 (probe).