When they first released the rifle, and then repeatedly since then. 500 of each, 10 of each retained by Colt Canada for their own corporate collection. So 490 sa15 and sa20 complete rifles released with the laser roll mark. Hence why it says "Limited Edition" on all of their website marketing.
The stripped lowers and complete lowers being sold are registered as sa15 rifles, but have no laser model name marking. Colt Canada is no longer producing rifles with the fixed front sight and have converted their production completely to IUR style rifles, of which there are multiple IUR variations depending on purchaser requests.