Battle Steel MLOK ARCA Rail Adapter 1.5in x 3in. Cnc Machined From Aircraft-grade 6061 Aluminum. Type Ii Class Iii Hard Anodized. Mounts Directly To M-lok Compatible Systems. Precision Machined Aluminum Construction For Strength Without Excess Weight. Functional Snag-resistant Beveled Edges. Corrosion-resistant Hard Anodized Finish. Close-end Rail Which Limits Over-travel Of Your Rifle While Also Serving As Installation Reference Points(close-end Forward) Specifications for Battle Steel MLOK ARCA Rail Adapter: Manufacturer: Battle Steel Color: Black Finish: Class III Type II Hard Coat Anodized Fabric/Material: 6061 Aircraft Grade Aluminum Gun Rail: M-LOK Gun Make: Universal Gun Model: Universal Dimensions: 1.5 x 3 in Package Contents: Battle Steel MLOK ARCA Rail Adapter Battle Steel BS-ARCA: MLOK ARCA Rail Adapter 1.5in x 3in