American Built Arms Company Picatinny Rail Polymer M-lok 5-slot Black. Specifications for American Built Arms Company Arms Picatinny Rail Polymer M-LOK 5-slot: Manufacturer: American Built Arms Company Color: Black Fabric/Material: Polymer Gun Rail: Picatinny Length: 6 in Width: 3.05 in Height: 0.65 in Additional Features: 5-slot Dimensions: 0.65 X 3.05 X 6.00 in Features of American Built Arms Company Arms Picatinny Rail Polymer M-LOK 5-slot Light weight polymer material reinforced with high strength fibers Continuous Mil Spec Picatinny rail designed to deliver maximum reliability This product is the single five (5) slot Picatinny Rail that comes with the M-LOK mounting hardware These M-LOK Picatinny rails are not compatible with the AB Arms MOD 1 or AB Pro carbine hand guards Package Contents:American Built Arms Company Arms Picatinny Rail Polymer M-LOK 5-slot American Built Arms Company ABAMR5: Picatinny Rail Polymer M-lok 5-slot Black