Evolution Gun Works Mystic Precision T-Slot Rail Long 4.595in Black. Manufactured by EGW for Mystic Precision.Comes with: 2) 10-24 flat head screws2) 10-32 flat head screws This adapter should allow you to use the MPod with M-Lok handguards. You will need to make sure your backer plates accept 10-24 or 10-32 screws. You may also use a washer and nut to secure the rail in place.You will need 2 holes in stock or use the dual stud inserts. This rail has hole spacing 1.5in. to 2.6in. center to center. Specifications for Evolution Gun Works Mystic Precision T-Slot Rail: Manufacturer: Evolution Gun Works Color: Black Finish: Matte Fabric/Material: Aluminum Gun Rail: Picatinny Height: 0.4 in Weight: 2 oz Additional Features: Mystic Precision Condition: New Quantity: 1 Mount Type: Picatinny Attachment Type: Picatinny Package Contents: Evolution Gun Works Mystic Precision T-Slot Rail Evolution Gun Works 32133: Mystic Precision T-Slot Rail Long 4.595 in Black