a mk19 for 600 grand? in my experience with the mk19, it jams too easily (especially in iraq w/ a lot of dust flying around), a little too bulky, only has 25 round belts, and is not my prefered method of engagement. of course, i like to be a few mile away shooting my howitzer, but i did do convoy security missions in baghdad. now on the issue with the tft, it would take too long to get the correct data on the gun given the t/e that you have is not defective, plus you have to compensate for diff. of elevat. and so forth. now with the mortar not being able to do direct fire, the 60mm mortar has a hand-held mode and can be shot direct fire at a target in the hand operated mode given you put the bottom on something sturdy like a wall or tree. now with shooting a mk19 round from a m203. its like tripling the powder in the round. the m203 breech cannot stand the pressure that will be put off, and it will mess your hand up.