554NEW BIO-Based Formula. Highly effective concentrated paste formula that lasts longer and takes less time to clean with than ordinary liquid or aerosol type cleaners. 

These premium bore brushes are made with a fiber that is cobalt blue in color so it can't be mistaken for any other type brush. 

.30/.308 caliber

Fits .22, .243, .30, .38, .40, and Larger Caliber Barrels Compatible with Teslong NTG100 Series Rifle Borescopes NOT compatible with NTG200 Focus & Fold Borescope Improves Visibility in Larger Caliber Barrels See More and Inspect Faster Keeps Your Probe Centered In The Barrel Easily Threads onto NTG Borescopes

15AngelArms gun cleaning patches are the highest quality, non-fraying, 100% natural fibers, with maximum solvent absorption and cleaning ability.

USB Design Compatible with Android, Windows PC, or Apple OSX 26-Inch Rigid Borescope Probe Fits .22 Caliber or Larger Barrels LED Ring Light Illuminated Removable Side View Mirror

The image quality is first rate and will give you a detailed view of your barrel 

Air Bulb on Side, Fit for 21mm Weaver & Picatinny Rail Mount, w/ Hex Key, Accurate Made

Top-of-the-Line Monitor - No App Needed 26-Inch Rigid Borescope Probe Fits .22 Caliber or Larger Barrels LED Ring Light Illuminated Removable Side View Mirror

Top-of-the-Line Monitor - No App Needed 45-Inch Flexible Borescope Probe Fits .22 Caliber or Larger Barrels LED Ring Light Illuminated Removable Side View Mirror