Ok, stop right there
No, you NEED a warhead strength of 1, or there will be no explosion.
But, I seem to understand you didn't even research warhead strength 3? Stop right there, seriously, a missile without at LEAST warhead strength 3 researched is very, very weak. And an AMM, even more so, just not worth considering. Too much space is taken up by the warhead, and that results in a slow missile.