The Otis Cleaning Kit 5.7x28mm is specifically designed to clean the P90 and all 5.7MM variants. This weapons maintenance system provides you the necessary tools to completely break down and clean some of the most critical parts of your firearm. The Memory-Flex Cables, solid brass slotted tips, 100% cotton cleaning patches, bore brushes, and an all-in-one cleaner, lubricant, and preservative allow you to quickly clean the receiver, chamber, neck and bore. The brass obstruction removers are used to knock out bore obstructions and stuck cases. The P90 chamber brush is a necessary tool to ensure the round inserts and extracts are properly cleaned each and every time. With the brass scraper tool set components, you can thoroughly clean the bolt, bolt carrier, locking lugs, and upper lower receivers in the P90. The comprehensive instruction booklet and mini CD-ROM with video instructions will help give you flawless performance in mission critical situations.