Lancer magazine accessories include two cinches, floor plate kits, and a 5-round stop for capacity-limiting regulations; Provides a handy way to speed up reload and increase capacity, while ensuring OEM reliability; Engineered to engage with locking ribs for increased stability; Adjustability with a tool-less, thumbscrew install method; Made from durable reinforced nylon; Intended for use With MPX magazines working with 10/20-round And 30-round bodies; Designed, tooled, manufactured, and assembled in the United States of America; Black Finish