American Built Arms Company Picatinny Rail Polymer M-lok 7-slot Black. Specifications for American Built Arms Company M-LOK 7 Slot Polymer Picatinny Rail: Manufacturer: American Built Arms Company Color: Black Fabric/Material: Polymer Gun Rail: Picatinny Length: 5.6 in Width: 3.05 in Height: 0.45 in Additional Features: 7-slot Dimensions: 0.45 X 3.05 X 5.60 in Features of American Built Arms Company M-LOK 7 Slot Polymer Picatinny Rail Light weight polymer material reinforced with high strength fibers Continuous Mil Spec Picatinny rail designed to deliver maximum reliability This product is the single seven (7) slot Picatinny Rail that comes with the M-LOK mounting hardware This M-LOK Picatinny rail is not compatible with the AB Arms MOD 1 or AB Pro carbine polymer hand guards Package Contents: American Built Arms Company M-LOK 7 Slot Polymer Picatinny Rail American Built Arms Company ABAMR7: Picatinny Rail Polymer M-lok 7-slot Black