Firefield Edge Carbine Two-Piece M-LOK Rail Black. This multipurpose handguard and rail system boasts lightweight yet heavy-duty aircraft-grade 6061-T6 hard-anodized matte black aluminum and a precision-machined design. Its a simple 2-piece construction allows the rail to be mounted to any drop-in style rail system using virtually no tools. Specifications for Firefield Edge Carbine Two-Piece M-LOK Rail: Manufacturer: Firefield Color: Black Fabric/Material: Aircraft-grade 6061-T6 Aluminum Gun Rail: M-LOK Weight: 6 oz Condition: New Included Accessories: 7 Slot M-LOK Rail Piece Hex Key Fit: most Picatinny Nato and Weaver sized mounts Length: 168 mm 6.625 in Features: Picatinny Nato and Weaver rail compatibility. Accommodates most accessories M-LOK Rail designed to add attachments where needed Aircraft-grade 6061-T6 aluminum skeleton Lightweight Package Contents: Firefield Edge Carbine Two-Piece M-LOK Rail Firefield FF34057: Edge Carbine Two-Piece M-LOK Rail Black