Not really - it uses the ar15 bolt head, but in a unique way. Paul at Thames Valley Guns has a fantastic report up on his website, detailing one of the older rifles:
https://www.thamesvalleyguns.co.uk/CAM Rifle.pdf
It's my understanding that the current production rifles have a higher quality of finish, and with their carbon/kevlar stocks, are massively(😅) lighter. You can see the current model on the BMS website:
http://www.bmstdgcam.com/the-cam-rifle/4582895221
Really cool set-up IMO.