What i've written is just a guess! I own 2-3 Perfect Line bows and like them a lot. Martin and other bow companies want to offer their customers a really affordable bow which simply can't be made in America, that's why they order it in Asia. If you don't want it get another American-made bow from their line (which is long enough by the way).
2008 Martin MOAB - 45-60#, set at about 51-53# / 55#" Perfect Line" compound/ 55# Mongol horsebow/ 45# "Perfect Line" takedown recurve/ 45# Bearpaw Grizzly hunter recurve/ 55# Samick Longbow Cheetah ... and several homemade bows