Hi everyone! I hope someone can give me some information about airsoft guns. Everything I've read and every person I've contacted has told me that airsoft BBs cannot break a window (assuming of course a reasonable range). My neighbor has a broken window that he discovered after a recent airsoft battle that my son and his friends had in our backyard. His house is at least 30 feet from our backyard and the second story window is a good 20 feet high. The kids all have inexpensive guns and use .12g 6mm BBs. I was absolutely mortified when my neighbor showed me the window and of course agreed to accept responsibility. However, I've been doing some research. Everyone I've talked to plus everything online without exception says it is impossible because the BBs and the window must obey the laws of physics: mass/weight/velocity/etc. Can anyone explain this to me so I can go talk to my neighbor again. Or, let me know if you know differently - that these BBs can break a window because I do want to be a good neighbor and be responsible for my son. Thank you so much!