[Upgraded] 0.21 Inch Slim Camera Head USB Endoscope Borescope with Semi Rigid Cable USB Type C Adapter for PC Notebook and Android Device(5M/16.4ft Cable)

I saw that a lot of people were saying it wouldnt fit down their 223/556 barrels. I had no problem whatsoever with mine. Even fit my 22 a bit tight but for 20$ it does what I needed it to do.. the app though took me a time or two get it working. After redownloading the app it now works everytime...

This requires downloading too many apps on some devices to justify its usefulness. Unless you want to lug a laptop around, or use it strictly as a bench device with a tower, OR have a friend that's an expert with Handheld Devices, I don't recommend!!