Ultradyne UD Arca Dynalock Rail Features The Ultradyne USA UD Arca Dynalock Rail is engineered to give a single rail section compatibility with both Arca and Dynalock accessory systems eliminating the need for separate mounting hardware for each standard. This dual compatibility means the rail can support popular accessories like the Orbit Ballhead alongside other Arca clamp devices already on the market. Machined from 6061 T6 aluminum the rail balances strength with a low overall weight of just 2.1 oz for the 3 section keeping the handguard from gaining unnecessary bulk. Hole spacing on the rail is strategically set to align with M-LOK slot patterns keeping installation straightforward. A hardcoat anodized finish covers the aluminum rail providing resistance to scratching and corrosion during regular handling and field use. The rail installs directly onto an M-LOK handguard using the included fasteners and the process is simple enough for most owners to complete themselves though a qualified gunsmith can also perform the installation. At 1.50 wide and 0.315 tall the rail adds minimal profile while still providing a secure mounting surface. For shooters looking to expand their rifle s accessory options with Arca and Dynalock compatibility the Ultradyne USA UD Arca Dynalock Rail is available for sale at GrabAGun. Ultradyne UD Arca Dynalock Rail Specifications Manufacturer: Ultradyne Model: UD Arca Dynalock Rail Type: Rail Color: Black Material: 6061 T6 Aluminum Finish: Hardcoat Anodized Length: 3 Width: 1.5 Height: 0.315 Compatible Hosts: M-LOK Weight: 2.1 oz Available At: GrabAGun