Teslong Rifle Borescope for Phone & PC - USB-C Ready Inspection Tool

In this review the Teslong NTG100H-C rifle borescope shows itself as a practical inspection tool for shooters and gunsmiths who need clear, repeatable views down a barrel. The single biggest reason to buy is its USB-C compatibility for direct connection to iPhone 15/16 and modern USB-C phones and tablets, combined with a rigid 26 in probe and depth markings that make pinpoint inspections straightforward and repeatable. It is a focused tool for diagnosing fouling, throat erosion, rifling wear and chamber issues without guesswork.

Key Features

• USB-C and multi-cable support: Direct USB-C connection to iPhone 15/16 and USB-C Android devices plus bundled USB and MicroUSB cables keep it usable with Windows and Mac computers and older phones.
• 0.2 in diameter probe: The 5mm micro probe with HD close-focus camera fits.20 caliber and larger barrels for detailed inspection of rifling and fouling.
• Six mirror options: Five 45 degree mirrors for a range of bore sizes and a 35 degree low-glare mirror improve side-view visibility and reduce wall glare in different calibers.
• Rigid 26 in probe with markings: Laser-etched depth marks and a rubber positioning ring let users locate and return to exact positions inside the barrel.
• Adjustable lighting and durability: Six LEDs with variable brightness provide even illumination, and the waterproof, corrosion-resistant probe plus braided cables increase longevity and ease of cleaning.

Who It's For

This borescope is aimed at firearm enthusiasts, competitive shooters, and gunsmiths who need precise visual inspection of rifle barrels from.20 caliber upward. The rigid probe and depth markings are particularly helpful for anyone who wants repeatable evidence of wear, fouling or chamber damage during maintenance or troubleshooting.

It is less useful for very small calibers under.20 or for users who prefer a completely wireless inspection workflow; those who need the smallest possible probe or a wireless-only camera should consider other form factors.

Pros & Cons

Pros

• Direct USB-C connectivity to current phones makes setup fast and avoids adapters for iPhone 15/16 and USB-C devices.
• Rigid 26 in probe with depth markings provides excellent control and repeatable positioning during inspection.
• Six mirror options and adjustable LEDs deliver versatile, low-glare viewing across multiple calibers.
• Waterproof probe and corrosion-resistant construction simplify cleaning and extend service life.

Cons

• The probe diameter is designed for.20 cal and larger, so it will not fit smaller barrels.

Specifications

Probe diameter	5mm (about 0.2 in)
Probe length	26 in rigid stainless steel
Connectivity	USB-C, USB-A, MicroUSB cables included
Illumination	6 adjustable LEDs
Mirrors included	Five 45 degree mirrors (5mm, 6mm, 7mm, 8.5mm, 10mm) and one 35 degree 5mm mirror
Waterproof	Yes, probe is waterproof

Our Verdict

The NTG100H-C is a solid, purpose-built rifle borescope for anyone who inspects.20 caliber and larger barrels regularly. Its USB-C phone compatibility, rigid probe with depth markings, and multiple mirror options make it a practical value for shooters and gunsmiths who need reliable, repeatable inspections without cumbersome adapters.

Frequently Asked Questions

Will this connect directly to iPhone 15 or 16?
Yes. The NTG100H-C includes a dedicated USB-C cable for direct connection to iPhone 15/16 and other USB-C phones and tablets.

What calibers will the probe fit?
The 5mm probe is designed to fit.20 caliber and larger barrels; mirrors allow better viewing for up to.50 caliber sizes.

Is the probe safe to clean and reuse?
Yes. The probe is waterproof and corrosion-resistant, and the braided cables increase durability for repeated cleaning and use.