ed- the handles are the same for 12 /20 - al2 have a slightly longer body and the receiver has an indentation to allow for that--i have taken a dremel grinder and touched up the inside of al al2 handle to clear the receiver long slot it recoils into when putting it on a 303 -- buy both of those and i'll send for free!!
on your quad purchase-i am thinking of having all beretta shooters do a " 303 family tree" to trace back their guns heritage -its amazing where all the parts go, as i rarely sell a whole gun!!--the best has been selling parts back to italy!!!!what a great satisfaction!! wally