The Cdn Forces designated them the C2B1 (If I recall correctly). About the biggest writeup I have seen on them is in a Cooey pamphlet that was available years ago. I likely have it somewhere downstairs.
Unlike many Cooey rifles, most of the M82s actually had a serial number, albeit on the stock beneath the wrist. I remember in MooseJaw, the weapon tech had to scrap a bunch. He threw the barrelled receiver in the scrap metal, and saved the serialised stocks in case he had to account for the scrapped rifles.
There is a peep sight available for them. It installs in place of the little blanking plate at the rear of the receiver.
I found them to be a very accurate little rifle. My biggest beef was when you would gain your sight picture, manage your breathing, hold the breath, and sslooowly squeeze the trigger....to find you hadn't cocked the damn bolt .