What's in the Box ARCA M-LOK Rail Section (14") Mounting Hardware Proudly designed and made in the USA, this extended 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 and repeatable mounting. The M-LOK interface enables flexible installation in full slots or between adjacent slots, and multiple rails can be installed in line to form a continuous mounting surface. Firearm Features CNC-machined 7075-T6 aluminum construction Matte black anodized finish M-LOK interface for versatile mounting Contoured design to prevent snagging Laser-engraved positional indicator markings Forms continuous rail when installed in series Compatible with ARCA, R-LOCK, and MRAS QD systems Proudly made in the USA Firearm Specifications Manufacturer: Made in USA Model: ARCA M-LOK Rail (Long) Material: 7075-T6 Aluminum Mount Type: M-LOK Modular System: ARCA Surface Finish: Anodized Color: Black Overall Length: 14.17" Width: 1.50" Height: 0.32" Weight: 4.1 oz Rail Space Required: 9 M-LOK Slots