Search  for anything...
StrongTools

3.9mm Small Hole Borescope, Aperture Endoscope Camera - Suitable for. 20 Caliber and Larger Pipes, Gun Barrel Inspection Tool, Suitable for Android and iOS Smartphones iPhone, iPad, Samsung

  • Based on 38 reviews
Condition: Used - Like New
Checking for inventory...

Notify me when this product is back in stock

$25.19 Why this price?
Save $84.80 was $109.99

Buy Now, Pay Later

As low as $6 / mo
  • – 4-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: Unavailable
Fulfilled by Amazon
Available payment plans shown during checkout

Recently Viewed

Features

  • [ Ideal for visual inspection of gaps / gun barrels] The high-definition digital (1280*720P) endoscope uses an innovative close-up camera to help you inspect the inside of rifle barrels on iOS or Android mobile devices. This tool will greatly help you evaluate your cleaning plan or diagnose problems, saving time and money!
  • [ Camera with a diameter of only 3.9mm] a probe with a diameter of 0.2 inches can easily enter the barrels of various rifles to check cleanliness, throat corrosion, tool marks, rifling wear, chamber damage, and dirt. Or various problems inside other pipelines.
  • [ Waterproof Borescope] IP67 Waterproof, 3.9mm Diameter Probe, coming with 6 adjustable LED light and thin waterproof probe, this endoscope is suitable for various types of environments, for example, low-light or dark area, damp or wet area etc.
  • [Also reach further than that] for underwater camera, waterproof Micro-cameras, motor vehicle detector, sewer pipeline detector, search and rescue, criminal and custom detector, archaeological detect, the PCB detection, home care, aviation and space industries, care and tractors industries, petroleum drilling industries, constructions and so on.
  • [10-15 meters transmission distance] No cable restrictions, easy to use. Endoscopes provide you with a wonderful experience of capturing 1 million pixel high-definition videos and images at close range. Semi rigid cables can rotate 360 degrees, making it easy to choose the viewing direction.

Description

Endoscopes provide you with a wonderful experience of capturing 1 million pixel high-definition videos （720P) and images at close range. Semi rigid cables can rotate 360 degrees, making it easy to choose the viewing direction. It can also be used in dark environments, with adjustable brightness and the ability to turn off lights. IP67 Waterproof, thin waterproof probe, this endoscope is suitable for various types of environments, include damp or wet area etc. Laser boresighter kit Laser boresighter kit-7pk 223rem & 9mm boresighter 12GA laser cartridge Dry fire laser target Pistol organizer racks Wall mount handgun hanger

Package Dimensions: ‎5.16 x 4.69 x 2.2 inches


Item Weight: ‎4.9 ounces


Manufacturer: ‎StrongTools


Item model number: ‎3.9mm-720P


Batteries: ‎1 Lithium Polymer batteries required. (included)


Date First Available: ‎September 11, 2025


Frequently asked questions

This product is currently out of stock. Please check back later for shipping info.

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Easy set-up!
Perfectly sized to fit into smaller rifle bores. Easy to set up application on I-Phone, works very well. Adjustable lighting levels is a plus. Works Great and just what I wanted.
Reviewed in the United States on April 11, 2026 by Smokepole
    • Set up was a bit difficult but the camera works.
This was a little tricky to set up. The instructions in the box were not helpful. 1st issue: the wifi module is obviously Micro USB, whereas the dongle I saw on the camera had USB-C and USB. I almost returned it because of this perceived issue. I looked at the Amazon listing and found a picture showing the USB port converted to Micro USB. Second, I had trouble connecting the camera to my phone's Wi-Fi because I plugged it into the wrong side. Again, a user issue, but it was frustrating. Again, about the return. However, some yellow text in the listing pictures basically said, "Plug it into the correct side." I did this, and it worked. It is a little tricky to maneuver in a rifle barrel, but it did its job. ... show more
Reviewed in the United States on February 5, 2026 by Derek L
    • Had to return
Item did not have proper cord
Reviewed in the United States on April 12, 2026 by Don Crafton
    • Did not work
Did not work as advertized
Reviewed in the United States on May 30, 2026 by Kindle Customer
    • Its just ok
The setup and instructions for this were terrible. The camera itself isn't bad and does what you'd expect it to. Clear and close up picture. There's a lot of confusion for connecting it but I saw other reviews that helped a lot more than the instructions did. Battery life is ok. The camera seems like its not terribly sturdy but isn't flimsy. The light was decently bright. It did the trick. Overall I don't think its worth the money and wouldn't buy it again. ... show more
Reviewed in the United States on February 19, 2026 by ThaPunisher
    • Borescope
Great
Reviewed in the United States on March 10, 2026 by Amazon Customer
    • Nice unit
Nice clear unit but cable could be another 18-in long
Reviewed in the United States on June 18, 2026 by Larry Lowe
    • Love it
Review Image by Crash Override.
Crystal clear quality and operates with or without the Wi-Fi module. I've used it on Windows, Linux, android with no issues. The price is fantastic, it's incredibly easy to use and is now attached to the back of my laptop with a strap so it's always to hand.
Reviewed in the United States on January 18, 2026 by Crash Override.

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for inventory...