US Patent 10048030 Firearm magazine floor plate assembly

A floor plate assembly for a firearm magazine for use in automatic and semi-automatic pistols and rifles is designed to occupy a minimal amount of space inside the magazine so that more magazine volume is available for bullets in a minimal magazine size. The magazine floor plate assembly includes a floor plate and a lock plate. The floor plate includes opposing lock plate guides that secure to the base flanges of a magazine housing. The lock plate acts as a spring for snap assembly and is inserted underneath the back edge of the magazine housing over the bottom inside surface of the floor plate, so that the lock plate covers the open magazine back side, while keeping the floor plate tight and without movement.