Trying to take advantage of all the sales going on. My budget is $120 with shipping and I found these four guns. JG M5A4 (http://www.airsoftmegastore.com/192...ft-AEG-Rifle-Newest-Production-Run-Model.aspx) JG M16A3- Enhanced (http://www.airsoftmegastore.com/190...rel-Newest-Enhanced-Production-Run-Model.aspx) JG AUG (http://www.airsoftmegastore.com/186...Assault-UA-1-Civilian-Electric-AEG-Rifle.aspx) JG G3 (http://www.airsoftmegastore.com/188...-Gearbox-AEG-Rifle-NEWEST-ENHANCED-MODEL.aspx) Which would be the best gun in your opinion? I don't really care about it looking cool- just need it to be lasting. I probably won't upgrade internals.