The biggest complaint with FALs has always been recoil and barrel climb during automatic fire. When FN was developing the rifle shortly after WWII, they had in mind chambering for a smaller 7mm round. Then the US and all of the NATO countries went Ape $hit over the 308 Win/7.62 NATO round. FN pretty much streched the envelope by chambering for the NATO cartridge and changing a few springs. They still managed to come out with a pretty decent rifle, but it does kick.

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