Is anyone familiar with FN's weapons systems? In particular, I am interested in the FiveSeven pistol, the PS90/P90, and the FS2000/F2000. How does the 2000 series compare to standard AR's? The 5.7 round seems very interesting: faster, more accurate, and more lethal than a 9mm, but does not overpenetrate like the .223/5.56. What is your firsthand experience or take on this caliber and these weapons. Provide pics if possible. Thanks.