The Area 419 ARCALOCK 12 in. M-LOK Dovetail Rail brings the same mechanically-locking ARCA dovetail system to M-LOK forends, requiring 6 consecutive M-LOK slots for attachment. Serrated rail sides interface with Area 419’s proprietary clamp so it will not slide under pressure the way a standard friction-fit ARCA rail can.

Machined to the RRS 1.5 in. dovetail standard from 6061-T6 aluminum and Type 3 hardcoat anodized, the rail weighs just 4.1 oz and includes M-LOK slots on its underside so you can still attach other M-LOK accessories to it.

Key Specifications

• MPN: 419-ALK-MLOK12
• Manufacturer: Area 419
• Rail Length: 12 in. (4.1 oz)
• Attachment: Requires 6 consecutive M-LOK slots; M-LOK mounting hardware included
• Dovetail Standard: RRS 1.5 in. dovetail (locks only with an Area 419 clamp)
• Material/Finish: 6061-T6 aluminum, Type 3 hardcoat anodized, made in-house in the USA

Frequently Asked Questions

How many M-LOK slots do I need for this rail? It requires 6 consecutive M-LOK slots to attach – if your stock has fewer, Area 419 recommends its 12 in. Universal rail with M-LOK attachment nuts instead.

Does the rear barricade stop come with this rail? No, the rear angled barricade stop is sold separately.

Buy the Area 419 ARCALOCK 12in M-LOK Dovetail Rail – Black at Schaefer Defense

Add a lockable ARCA-compatible dovetail rail to your M-LOK forend with the Area 419 ARCALOCK 12 in. M-LOK Rail. Shop more from Area 419 or browse our full Scope Bases selection at Schaefer Defense.