Out for almost 18 months through injury, the 30-year-old striker's current contract has run out and he will not be offered a new deal.
Nevertheless, Chris managed to return to reserve team action, albeit briefly, at the end of the season and he is now confident he can return to full fitness.
Disappointed to be leaving the Lane, Chris says he is looking forward to his next challenge - one he hopes remains in the Premiership.
Chris reflected: "I haven't had the chance to show my form to the boss and on that basis I won't be getting another contract here next season.
"It's understandable from his point of view not really having seen me play.
"It's disappointing to leave under these circumstances and not having played for over a year but I have to get myself fully fit and look to the future.
"I'll train through the summer, see what offers come up and get myself fit for my next club.
"I'll be looking forward to the next challenge. It might be good to have that change.
"It would have been nice to have been fit here and have another season.
"I signed a five-year contract and I've not really had the chance to get another contract or show a lot of form in that time. I've had a lot of injuries and I just want to play football again.
"I would like to stay in the Premiership and I'm confident when I'm fit I can score goals in the Premiership. We'll wait to see what happens in the summer."
Chris explained that the niggles, aches and pains had kept him out of playing further reserve team games at the end of the season.
"I've had a back problem," he said. "I played a couple of reserve games and had a couple of niggles but I'm fit again now and I'm looking forward to getting back to training and getting right for the summer.
"It would have been nice to have had more games but I feel fine now.
"I've just got to look at myself and get myself fit.
"People have seen what I can do when I'm fit and I'm always confident when I'm 100 per cent fit.
"It's disappointing that I've perhaps not fulfilled my potential since I've been here but I'm only 30 and if I can get fully fit I can have a good end to my career."
By Paul Miles
Chris Armstrong has taken an understanding view following the news that he will be released by the club.