OK, I'll narrow it down to an AEG, and there are no FPS rules where I play. I want both the internals and the externals to be upgradeable -- it should (as in, 'must unless it severely damages the other criteria') be able to get sights/scopes*. Fine, the ROF isn't that important, but it should be decent for an AEG. Preferably hicaps, but the capacity importance varies with the ROF -- higher ROF, more capacity. I am looking for a gun that will be able to keep me alive against anywhere from 1-6 people, some of whom might have the advantages of surprise and the higher ground. The tactics are the following:
Must be able to use as a stand-alone weapon, such as in 1+ vs. me,
We (me and my airsoft buddies) play in a semi-muddy, semi-swampy forest in the back of my pasture-it's around 7 acres of nature-trees, hills, swamps, and mud,
I'm an aggressive player, but I know when to attack and when to retreat, and;
We're not always in a group, and not always even in pairs, but we do communicate in-battle when we can.
*This is added because my current Firepower F4-D has a 'fake-scope' (in other words, a stupid real-scope eliminator) that holds 500 BBs but makes attaching a scope impossible.