1. It’a nor implied, the rifle squad is only available as inexperienced. You can achieve the desired effect by purchasing a regular LMG squad. pay for the 7 extra men, do not buy the SMG for the NCO or any LMGs and you have a 12 man rifle squad. The squad won’t be “green”, but that only benefits an inexperienced unit anyway. Both units have the option of AT grenades, so no difference.
2. As Richard says, what your miniature is modelled with doesn’t change what the list allows it to be armed with. A rifle that happens to have a scope is just a rifle for game purposes unless the unit has a sniper rifle in it’s weapons line or as an option and you have paid for it.
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