Mean Arms AR-10 Loader 7.62x51mm NATO/.308 Winchester 10 Round Black. 62x51 that will allow you to safely and efficiently reload your fixed magazine without the need to break down the firearm. Simply place the MA-Loader into your AR-10's ejector port and press the thumb-ring slider to quickly load or reload. Specifications for Mean Arms AR-10 Loader: Manufacturer: Mean Arms Color: Black Finish: Black Fabric/Material: Polymer Caliber: 7.62x51mm NATO .308 Winchester Gun Model: AR-10 Number of Rounds: 10 Additional Features: California Compliant Condition: New Features of Mean Arms California Compliant AR-10 Fixed Magazine Loader Fits: MIL-SPEC Receivers Package Contents: Mean Arms California Compliant AR-10 Fixed Magazine Loader Mean Arms 2100569: AR-10 Loader 7.62x51mm NATO/.308 Winchester 10 Round Black