Carbon residues accumulate during firing and can impair your accuracy. Moreover, it has 3 mirror with a side view to examine the walls of the barrel and the grooves and grooves of the trunk up close.
5mm Len Rifle Borescope Camera 1.2m Flexible Probe Visual Barrel Inspection Tool
Dual Lens Articulating Borescope Camera Endoscope Inspection Camera with Light
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Industrial Endoscope Camera HD 1080P 4.3'' Screen Dual Lens Inspection Borescope
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Endoscope Camera with 4.3'' LCD Digital Handheld Borescope Camera with 8 LED
