The M1 Carbine is the standard by which all PDWs are measured.

[SHORT-N-SASSY]

Fact is: The FN P90 has always been one of my favorite Bullpup designs. However, the performance of the 5.7x28mm cartridge is a far cry from that possible with the 6.5mm Grendel. And, as reported in other Pages of our 6.5 Grendel Forum, a FN P90 6.5mm Grendel is not feasible.

From my original Post on this Thread, ". . . and dialing-in today's typical theaters of war . . . and the recommended extended-range cartridges for those battlefields . . ."