The Dfco Dos Boot is a smart low-profile base plate upgrade that transforms your Magpul PMAG GEN M3 AR15/M4 magazines with +2 rounds of capacity and enhanced functionality.Dfco Dos Boot Magazine Extension+2 rounds additional capacity for Magpul PMAG Gen 3High-impact injection-molded nylon constructionConvex shape design with matte finishFunctions as convenient monopodImproves grip for quicker smoother reloads10-pack display cartonPerfect for competitive shooters and tactical applications the Dos Boot combines increased magazine capacity with improved handling and stability features in a durable low-profile design.