Hi I saw this gun on Craigslist and it caught my attention. Classic Army M16A2 I was pretty sure when I first saw it that it was a good deal. I am just looking for more help on it though. I sent the owner an e-mail and he said "something is messed up in the trigger. where two things connect so that the gun fires. the gun shoots and works but its not as responsive as it could be." What kind of problem do you think this is. I dont know to much about airsoft so i probably couldent fix it my self. also does anyone know if this is the same as the M15A4? I am interested in this because I have never seen a full metal gun by Classic Army under 250 or 300 before. and the gas pistol? Is it worth it? please help.