The 25-year old has been a regular bench-warmer this term, despite being a near ever-present under former boss Keith Alexander.
Having made just two starts under the club's new management, though, first team coach John Schofield has seen fit to let the player leave Sincil Bank, with the deadline-day signing of Nicky Eaden seemingly paving the way for Cryan's departure.
One man's loss is another's gain, though, with Pilgrims boss Steve Evans appearing only too happy to sign Cryan: “When I was instructed to sell Lee Canoville the first player I considered in my mind to bring in was Colin,” Evans told the club's official web-site.
The defender – who can operate across the defence, as well as in midfield – failed to make a league start this term, although did appear four times from the bench.
LCM, naturally, wish Cryan the very best for the rest of his career.