Really Right Stuff B2-mAS Screw-Knob Clamp with 1/4″-20 Screw

The Really Right Stuff (RRS) B2-mAS is a compact, ultra-durable Arca-Swiss compatible quick-release clamp designed for precise camera and accessory mounting. CNC-machined from aircraft-grade aluminum with stainless steel hardware, it provides exceptional clamping power and rigidity in a lightweight form factor. The manual screw-knob mechanism allows for fine control when securing Arca-style plates, with laser-engraved index marks to assist with nodal point alignment and panoramic setups. Featuring a central counter-bored hole and an included 1/4″-20 flathead screw, the clamp attaches securely to ball heads, monopods, bracket arms, or custom mounting rigs.

Key Features and Specifications

* Arca-Swiss Compatibility: Accommodates standard Arca-style dovetail quick-release plates and rails from Really Right Stuff, Wimberley, Kirk, and others.
* Precision Screw-Knob Operation: Texturized aluminum screw-knob provides positive, secure locking force and smooth jaw adjustment.
* Laser-Engraved Alignment Scale: High-contrast millimeter index markings along the jaw aid in precise centering and repeatable placement.
* Aircraft-Grade Aluminum Construction: Machined from solid bar-stock aluminum with a hard-anodized black finish for high wear and corrosion resistance.
* 1/4″-20 Threaded Mounting: Features a counter-bored center mounting hole and includes a 1/4″-20 stainless steel screw for direct attachment to support gear.
* Compact & Lightweight: Designed with rounded corners to minimize snagging and reduce overall gear weight.

Condition and Included Accessories

* Included Accessories: Really Right Stuff B2-mAS Screw-Knob Clamp and 1/4″-20 mounting screw included.