The Remington vtr is good, I did a carry handle and front sight build on that platform, they are very well made, solid, but heavy. The SU22 by Kel Tec is an excellent rifle, very light, large mags avail, but change the rear stock to an A2, the Ranger stock just dosent shoulder well. GSG 16 and 15 are both good choices, with the 16 having a large drum mag avail.