One is a .22 CZ upper, the other a .223. Both had barrels turned down to the original M16 weights. The girls are quite safe. Both are very mature for their age, I'd have no reservations about letting them loose in my home. Both show natural graciousness, in addition to the learned politeness. when I gave one of them a chocolate bar, the first words were: "We can share this." I also gave one of them a 30rd box of IMI .223 ball and had to modify the label "Keep out of reach of children." It now reads Keep out of reach of ordinary children.