I was looking at those, but all the good ones (DPMS, Entreprise) are a bit much for an E-6's pay.
My thought is that the gun, 5 mags of normal size, sling, and cleaning accessories should NOT exceed $1,000.00. That way, more practice ammo can be had, and more range time.
You can get a good FAL with all of that for under 1000 at almost any gun show in the US. I bought mine at a gun dealer in Dillon, MT six years ago for $550.