Area 419 ARCALOCK Clamp and Barricade Stop Kit

The Area 419 ARCALOCK Clamp and Barricade Stop Kit is a two-piece accessory that provides both a barricade stop for positional shooting and a versatile ARCA-compatible clamp for tripod and rail mounting. The clamp features a proprietary two-stage screw design with dual thread pitches: 16 TPI for rapid sliding when unloaded, and 32 TPI that engages under tension for serious clamping force. Approximately a quarter turn releases the clamp from ARCALOCK rail detents for quick repositioning. The moving side of the clamp is dovetailed on both sides to prevent tilt, and the knob/screw design makes it impossible for the clamp to fall apart even when fully loosened.