I've read that the mig15 intended purpose was to shoot down long range american bomber, not to dogfight nearly identical fighters
Milo I think it was the Mk5 that Canadair installed the 20's in and these were exported. I was positive I'd seen a Canadian saber with 4 cannons in the nose but cant find where I saw that pic.
Morf, I got out my Milberry book on the CL-13. Under variations it does not list any 20mm but does mention slat deletion > 6-3 leading edge.I went through the section on the RAF and could find no photo with 20mm.In some photos it is hard to see the upper gun port.Now the Vampires had 20mm guns.I would highly recommend the Milberry book for those interested in the Sabre.http://www.amazon.com/The-Canadair-Sabre-Larry-Milberry/dp/0969070373
I don't think so. The last Sabre, the Mk 6, still had 5 .50" hmgs.
So was the US Navy's version of the F-86, the FJ-2 "Fury".