The present invention provides a handle assembly and trocar needle attachment mechanism, system and method for sling implantation. The handle assembly is selectively attachable and detachable with the needle to facilitate retropubic, or "inside-out," sling implantation procedures. The handle assembly can include a handle body portion and a release sleeve in certain embodiments. The needle can be curved, and can include a proximal end portion and a distal end portion. The proximal end includes a tip that can be releasably secured in the handle assembly. In certain embodiments, the tip can include one or more circumferential indents, grooves or angled surfaces and a bulbous end portion.
