
Availability: In Stock
The Ultradyne Arca Rail Dynalock is a precision aluminum mounting rail that bridges two accessory ecosystems on your rifle. Built for shooters who want the flexibility to run both Arca and Dynalock-compatible gear—optics mounts, ballheads, clamps, and tactical accessories—this rail solves the either-or problem. Install it using the included M-LOK fasteners (or have a gunsmith fit it), and suddenly your M-LOK handguard or forend becomes a universal mounting platform. Whether you're building a precision long-range setup, a tactical carbine, or a hybrid hunting rifle with modern accessories, the Ultradyne rail gives you options without compromise.
Made from 6061 T6 aluminum and finished with hardcoat anodize, this rail is built to handle real-world use. The anodized finish resists corrosion and wear, and the aluminum construction keeps weight down where it matters. Ultradyne engineered the hole spacing and geometry specifically around M-LOK standards, so mounting is straightforward and secure. Available in four lengths to fit your setup, each size is engineered with the right number of mounting holes and fasteners for solid, repeatable installation.
The Arca/Dynalock dual-compatibility angle matters more than it might sound: it means you're not locked into one manufacturer's ecosystem. Run an Arca clamp for your spotting scope one day, swap to a Dynalock ballhead for stability the next. It's the kind of flexibility that keeps your precision rifle adaptable as your mission changes—whether that's competition, hunting, or field work.
| Material | 6061 T6 Aluminum |
| Finish | Hardcoat Anodize, Black |
| Width | 1.50" |
| Height | 0.315" |
| Available Lengths & Weights | 3.00" (2.1 oz) | 6.15" (4.2 oz) | 9.30" (6.3 oz) | 12.45" (8.4 oz) |
| Installation | M-LOK fastening; fasteners included |
| Mounting Holes | 3.00" (4 holes) | 6.15" (8 holes) | 9.30" (12 holes) | 12.45" (16 holes) |
The Ultradyne Arca Rail Dynalock is compatible with all Arca clamp accessories and Dynalock-mounting gear, including the Orbit Ballhead with Dynalock. This gives you flexibility to mix and match accessories from both standards on the same rail.
The rail installs using M-LOK fasteners, which are included with the rail. You can install it yourself on any M-LOK-compatible handguard or forend, or have a qualified gunsmith fit it for you. Each length includes the appropriate number of fasteners for its mounting holes.
Available lengths are 3.00", 6.15", 9.30", and 12.45", with weights ranging from 2.1 oz to 8.4 oz respectively. Choose based on your handguard real estate and accessory configuration—longer rails accommodate more accessories and mounting positions, while shorter rails minimize weight and profile.
Yes. The Ultradyne Arca Rail Dynalock is designed for any M-LOK-equipped handguard, forend, or accessory rail. Hole spacing is strategically set for standard M-LOK compatibility across all length options.


SKU: 115646808 • Width: 2in • Height: 0.25in • Depth: 12.25in • Weight: 0.38oz





Availability: In Stock
The Ultradyne Arca Rail Dynalock is a precision aluminum mounting rail that bridges two accessory ecosystems on your rifle. Built for shooters who want the flexibility to run both Arca and Dynalock-compatible gear—optics mounts, ballheads, clamps, and tactical accessories—this rail solves the either-or problem. Install it using the included M-LOK fasteners (or have a gunsmith fit it), and suddenly your M-LOK handguard or forend becomes a universal mounting platform. Whether you're building a precision long-range setup, a tactical carbine, or a hybrid hunting rifle with modern accessories, the Ultradyne rail gives you options without compromise.
Made from 6061 T6 aluminum and finished with hardcoat anodize, this rail is built to handle real-world use. The anodized finish resists corrosion and wear, and the aluminum construction keeps weight down where it matters. Ultradyne engineered the hole spacing and geometry specifically around M-LOK standards, so mounting is straightforward and secure. Available in four lengths to fit your setup, each size is engineered with the right number of mounting holes and fasteners for solid, repeatable installation.
The Arca/Dynalock dual-compatibility angle matters more than it might sound: it means you're not locked into one manufacturer's ecosystem. Run an Arca clamp for your spotting scope one day, swap to a Dynalock ballhead for stability the next. It's the kind of flexibility that keeps your precision rifle adaptable as your mission changes—whether that's competition, hunting, or field work.
| Material | 6061 T6 Aluminum |
| Finish | Hardcoat Anodize, Black |
| Width | 1.50" |
| Height | 0.315" |
| Available Lengths & Weights | 3.00" (2.1 oz) | 6.15" (4.2 oz) | 9.30" (6.3 oz) | 12.45" (8.4 oz) |
| Installation | M-LOK fastening; fasteners included |
| Mounting Holes | 3.00" (4 holes) | 6.15" (8 holes) | 9.30" (12 holes) | 12.45" (16 holes) |
The Ultradyne Arca Rail Dynalock is compatible with all Arca clamp accessories and Dynalock-mounting gear, including the Orbit Ballhead with Dynalock. This gives you flexibility to mix and match accessories from both standards on the same rail.
The rail installs using M-LOK fasteners, which are included with the rail. You can install it yourself on any M-LOK-compatible handguard or forend, or have a qualified gunsmith fit it for you. Each length includes the appropriate number of fasteners for its mounting holes.
Available lengths are 3.00", 6.15", 9.30", and 12.45", with weights ranging from 2.1 oz to 8.4 oz respectively. Choose based on your handguard real estate and accessory configuration—longer rails accommodate more accessories and mounting positions, while shorter rails minimize weight and profile.
Yes. The Ultradyne Arca Rail Dynalock is designed for any M-LOK-equipped handguard, forend, or accessory rail. Hole spacing is strategically set for standard M-LOK compatibility across all length options.
SKU: 115646808 • Width: 2in • Height: 0.25in • Depth: 12.25in • Weight: 0.38oz

