Originally Posted by MaciekA
If you're going with a V2, go the M4 route. A world will open up!
This is very true. No other V2 AEG will give you as much control over the internal and external customization as a AR15 variant. Which sorta sucks if you hate M4s and want to be an individual. V2 parts are also the easiest to source replacements for in the airsoft world. Nothing's stopping you from learning about mechboxes using another platform though. I initially started tinkering with V3s before moving onto V6s (By far the easiest of the common gearboxes to work on), and then finally working on V2s. Gaining hands on experience with a gearbox regardless of the version will give you valuable skills and insight that's applicable to any sort of gundoc work.