Remington 40-X Bore Cleaner is a non-eroding bore cleaner made with earth suspension in mineral oil. Improving your accuracy by removing carbon and other debris that can affect the mechanical action, it is environmentally safe and is non acidic. Natural abrasives scrub away all types of fouling but will not scratch even the finest bores, leaving your bore sparkling clean without time-consuming soaking.FeaturesFormulated for rifles to improve cleaning, accuracy, and performanceContains high polishing compounds to make your bore mirror-cleanFast and easy to use; no soaking or foul odors40-X name ties into the product's origins in Precision Benchrest Shooting