fal's are expensive to build , if you want a good one. besides the cost of a good kit, it will run you about $400.00 for a dsa receiver and about another $400.00 for the dsa para conversion set. a dsa fcg is about 70.00 then if you want the bbl cut that is extra. add on all the goow gaws and it adds up fast.
personally I think it is a crime against humanity to add all the stuff, to me a fal is the greatest rifle ever built and is perfect as is. I have 5 rifles and a pistol, my favorite is a 16" stg58 with a para stock and izzy handguards I built.