Double taps with virtually any calibre aren't all that much of a problem. Using any assault or battle rifle as an automatic weapon on a regular basis is just plain silly. They are inherently too light both in bulk and construction to soak up the recoil (as a dedicated machinegun is able to do) and deal with the heat buildup.
Some weapons handle the issues of high rates of fire better than others. The G11 springs to mind as a very good example of what can be done when conventional ideas are thrown out the window and the engineers are given the freedom to do it right. It's just a shame the money ran out (due mainly to the German reunification) before it could be issued on a wide scale.
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If it moves, shoot it, if not push it, if it still doesn't move, use explosives.
Nothing happens in isolation - it's called "the butterfly effect"
Mors ante pudorem
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