Mean Arms AR-15 Feed Ramp Black. While not required for use of MA Loader installation of the MA Feed Ramp makes reloading smoother and faster. The Feed Ramp uses the hinge pin of ejection door and mounts in place of the ejection door. Specifications for Mean Arms AR-15 Feed Ramp: Manufacturer: Mean Arms Color: Black Finish: Black Fabric/Material: Polymer Caliber: 5.56x45mm NATO .223 Remington Gun Model: AR-15 Features of Mean Arms AR-15 Fixed Magazine Loader Feed Ramp Fits: MIL-SPEC Receivers Package Contents: Mean Arms AR-15 Fixed Magazine Loader Feed Ramp Mean Arms 2100269: AR-15 Feed Ramp Black