An adapter assembly, for connecting a surgical reload to an electromechanical handle assembly, includes an outer tube； a trocar assembly releasably securable within a distal end of the outer tube, the trocar assembly including a trocar housing defining a pair of openings therein, wherein the pair of openings are in opposed radially extending relation to one another； and a trocar assembly release mechanism configured to releasably secure the trocar assembly within the outer tube. The release mechanism includes a pair of pins slidably supported within the outer tube, wherein each pin is selectively receivable within a respective opening of the pair of openings formed in the trocar housing； a release button supported in the outer tube and movable between an extended condition and a depressed condition； and a spring clip slidably supported in the outer tube, the spring clip interconnecting the release button and the pair of pins.
