This is a Maglula ltd. Mag Loader/Unloader known as the Lula chambered in 308 Winchester, model LU20B.
Since 2001" Maglula has manufactured professional military-grade tools for loading and unloading magazines. These products save valuable time at the range" field" armory and prevent pain associated with loading and unloading magazines. They also prevent damage to the magazine lips" therefore reducing weapon jams.
Features:
Eliminates Wear on Feed Lips
Takes One-Third the Time of Thumb Loading
Prolongs Magazine Life