Vector nerd calling in.
I’ve owned every version, and easily the best all round is the Krytac AEG. Guns are available, parts are available, very accurate reproduction, as actually designed by KRISS.
Mags are available, aftermarket upgrade parts available.
Most real steel parts fit
Next comes the KWA GBB. Functions almost identically to the real gun, identical dimensions, easily my favourite, but keeping them running is getting harder and harder as parts are not available. Very expensive, but loads of fun.
Most real steel parts fit
ARES G2, or Coyote Vector AEG in Taiwan/Japan. Similar, though different, dimensions to the real steel, very little aftermarket options, no spares, very hard to get mags.
Almost no real steal parts fit.
A&K Mod1 AEG as already discussed, heavy, not accurate, but cheap. Has electric recoil weight, which is why it’s so heavy.
My current Vector is a gen2.1 Alpine Krytac shell, with KWA GBB internals
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View attachment 53042