Ultradyne UD Arca Dynalock Rail Features The Ultradyne UD Arca Dynalock Rail gives shooters access to both Arca-Swiss and Dynalock mounting standards from a single rail attached to an M-LOK handguard. Hole spacing is strategically set to align with standard M-LOK slot positions with the 12.45 inch version using 16 installation holes and 4 fasteners for a secure rattle-free mount. This dual compatibility means accessories like the Orbit Ballhead with Dynalock along with virtually all other Arca clamp accessories can attach directly without an adapter. Machined from 6061-T6 aluminum the rail is built to handle the stresses of mounting heavier optics or stabilization gear. A hardcoat anodized finish protects the rail s black finish from wear and corrosion over years of field and range use. At a width of 1.50 inches and a height of just 0.315 inches the rail adds a low profile mounting surface without bulking up the handguard significantly. Weighing only 8.4 ounces at this 12.45 inch length it keeps the overall rifle build light despite adding substantial mounting versatility. For shooters running tripods camera rigs or other Arca-compatible gear off their rifle 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 Compatible Hosts: M-LOK Handguards Color: Black Material: 6061-T6 Aluminum Finish: Hardcoat Anodized Length: 12.45 Width: 1.50 Height: 0.315 Weight: 8.4 oz Available At: GrabAGun