On The EdgeWith the New FN P90 5.7x28mm by Al Paulson Military organizations have struggled for generations with two frequently overlapping problems: (1) how to arm troops whose primary mission is something other than the use of small arms; and (2) how to arm troops who need compact firepower for conducting special operations. A remarkable array of pistols, submachind guns and carbines have been fielded over the years in an, attempt to give people such as vehicle drivers, operators of crew-served weapons, support personnel and special operators a weapon with the optimum mix of compact size, hit probability, sustained...