With a 26-inch foldable probe and the Teslong innovative close-focusing camera, this digital borescope is perfect for inspecting the inside of most rifles barrels. This is a great tool to evaluate your cleaning regimen or diagnose firearm problems that saves time and money! Verify your cleaning regimen is effective, or inspect older barrels for wear, rust, pitting, fire-cracking, throat erosion, and other defects. Teslong digital borescope allow you to see deep inside the barrel of any rifle - spot corrosion damage, defects, and more - before you buy!The 0.2-inch diameter probe allows easy entry into rifle barrels as small as 0.22 caliber, to inspect cleanliness, throat erosion, tool marks, rifling wear, chamber damage, and fouling. Adjustable for brightness to give the camera a perfect view of the darkest inspection areas. With the adjustable and detachable 90Adeg side-view mirror, you can check the rifle barrel wall, or remove it to check the firing pin.This borescope can be used...