Well, as for parts, an M4 is very common, and a lot of brands are reliable. But if you want a sidearm, something like an MP7 or a different AEP might be a good idea.
You can go with gas, but in my opinion having a gas powered gun seems less convenient than a battery - you will have to buy several Co2 canisters or green gas everytime you play. Whereas an AEP or AEG needs nothing more than a few hours of charging.
Last edited by BGrail25; February 26th, 2010 at 21:18..