In addition to its 4 R-33 (AA-9) Amos missiles and 2 R-77 (A-12) Adders would a MiG- 31 carry a mixed load of 1 each Kh-58 (AS-11) Kilter and Kh-31 (AS-17) Krypton or can it carry two of each as mission parameters demand?
I'm not that familiar with the 'modern' stuff, but it might be better posing the question in the Aviation or Technical section, where you're more likely to get the info.