Vagrantviking has it right, basically. But you are discussing a Handgun, which needs more criteria to make it "Antique" than a Long Gun. Go to the RCMP site, or the Canadian Firearms Centre site, and look up "Antique Firearms."
Basically, a Handgun meets the "Antique" Status, if it DOES NOT MEET the following;
a. Cannot be "Antique" if chambered for .22 Short, Long, or Long Rifle
b. Cannot be "Antique" if chambered for the following calibres;
-.32 Short Colt, .32 Long Colt, .32 Smith & Wesson, .32 Smith & Wesson Long, .32-20 Winchester, .38 Smith & Wesson, .38 Short Colt, .38 Long Colt, .38-40 Winchester, 44-40 Winchester, .45 Colt (or commonly called .45 Long Colt)
NOTE: The term ".38 Special" is not used; this requires clarification
c. Cannot be "Antique" if made in 1898 or LATER
ANY other case, you need an RPAL.
I hope this helps.