What's in the Box ARCA M-LOK Rail Section Mounting Hardware Proudly designed and made in the USA, this compact ARCA rail is CNC machined from 7075-T6 aluminum and finished in a durable matte black anodize. Its contoured profile prevents snagging and discomfort when shooting unsupported, while laser-engraved positional indicator markings allow for precise, repeatable mounting. Designed to integrate seamlessly with M-LOK systems, this rail is compatible with standard ARCA, R-LOCK, and MRAS QD mounts and forms a continuous surface when multiple rails are installed in line. Firearm Features CNC-machined 7075-T6 aluminum construction Matte black anodized finish M-LOK interface for flexible mounting Contoured profile to reduce snagging Laser-engraved positional indicator markings Forms continuous rail when installed in series Compatible with ARCA, R-LOCK, and MRAS QD systems Firearm Specifications Manufacturer: Made in USA Model: ARCA M-LOK Rail (Short) Material: 7075-T6 Aluminum Mount Type: M-LOK Modular System: ARCA Surface Finish: Anodized Color: Black Installed Length: 3" Overall Length: 3.14" Width: 1.50" Height: 0.32" Weight: 1.3 oz Rail Space Required: 2 M-LOK Slots