The release button on this heavy-duty swivel is engineered to sit flush to the swivel body, virtually eliminating the chance for errant release of the swivel. Finished in Military Grade Non-Reflective Manganese Phosphate for prolonged durability. Engineered tight machined tolerances for precision fit performance. Designed to work with industry standard Full Rotation, Limited Rotation and Non-Rotating Quick Detach (QD) Bases.