Okay firstly, have there been any documented instances where these FR7 rifles have come apart when used with commercial or military .308W ammo? If as you say, these rifles are chambered for the .308W (7.62x51 NATO) round, chances are that most of them that have entered the civilian market will have been used with this ammo. So are they renowned for coming apart?

Secondly, is it likely that the Spanish authorities released a rifle chambered for 7.62x51 onto the civilian market if it couldn't actually be used safely with common or garden 7.62x51 ammo?

And finally, is it possible that the low powered .308 ammo used by the Spanish military in these FR7 rifles was actually intended to duplicate the recoil forces felt by the soldier when using the new CETME battle rifle, rather than being specially down loaded because of the supposed weakness of the actions in the FR7s?