Area 419 ARCALOCK Clamp Features The Area 419 ARCALOCK Clamp solves a common frustration with standard ARCA rails where a barricade stop or bipod clamp can slide under heavy pressure despite being tightened down. Its proprietary two stage screw uses a coarse 16 TPI thread when no tension is present allowing rapid movement of the clamp along the rail then automatically switches to a finer 32 TPI thread once tension is applied for added torque and holding power. A quarter turn releases the clamp from the detents on an ARCALOCK rail for quick repositioning while a full turn releases it entirely for removal. The clamp is also backwards compatible with standard ARCA rails by removing three pins retaining infinite sliding adjustment when used that way. Machined in house from 6061-T6 aluminum with a 303 stainless steel screw the clamp bolts directly to Atlas bipods using factory hardware and can be adapted to two screw Atlas bipods with a Picatinny adapter. The dovetailed design on both sides of the moving portion of the clamp prevents tilt and the knob and screw design keeps the clamp from falling apart if loosened too far. Finished in Type III hardcoat black anodize with a gold anodized knob the clamp pairs a rugged precision machined build with a distinctive two tone look. For precision rifle shooters who need their bipod connection to hold firm under any pressure the Area 419 ARCALOCK Clamp is available for sale at GrabAGun. Area 419 ARCALOCK Clamp Specifications Manufacturer: Area 419 Model: ARCALOCK Clamp Color: Gold Material: 6061-T6 Aluminum 303 Stainless Steel Compatible Hosts: ARCA / 1.5 Dovetail Rails Atlas Bipods Length: 1.6 Weight: 0.14 lbs Available At: GrabAGun