In terms of armaments, the exact payloads the SR-72 will be expected to carry have yet to be divulged – if anything. Secrecy aside, no current payloads exist that could pair with an airframe flying at speeds as high as Mach 6.0.
— Read on nationalinterest.org/blog/buzz/forget-top-gun-lockheed-martins-sr-72-aims-mach-6-210053