Buck Sirus spring assisted knife. 420HC stainless steel blade. Gray anodized 6061 T6 aluminum handle with black swirl accents. Push bar safety is located on the back of the knife. The knife can be fired with the dual thumb-stud or with the small metal lever located on the back of the knife, only visible when the knife is closed.
Buck’s ASAP Technology™ “assisted-opening” knives are functionally different from automatic knives (switchblade type) that typically use gravity or a handle button/lever to release the blade from a closed position. Buck’s 2-stage operation (safety & blade release lever) is designed for user safety and does not use a handle button/lever. However, users are responsible for investigating laws applicable to assisted-opening knives in their jurisdiction.