OK, I'll answer these in the order posted....Murray has my specs on the dovetails ( 0.285" ) for the rear and ( 0.250" ) for the front. He is checking as we speak. Standby "newshot". Tac Ord does not carry them. Fusion Firearms does sell to Canadian customers and they carry both the 70 and 80 series sights. The difference is in the front sight width, the rears are the same. He also has my specs and I'm waiting to hear. ( Good service from both these places, btw ) From what I've seen on YouTube and read about, the Norcs are a direct copy of the 1911, which is why Norinco copied it...interchangeability. ( that's why thy copied everything from SKS's to AK's to well, everything they make, almost. The sights sometimes need to be " filed-to-fit " but it isn't rocket science by any means. The main reason I bought the Norc ( for the princely sum of $339.00 ) was that they have had good reviews done on them and they are a cheap way to get into a pistol. Hell, most .22's are costlier. Canada Ammo has a sale right now....for $599.00 you get the 1911 and a 1000 rounds of ammo and they ship free all over Canada on orders over $100. I'll let you guys know the outcome.