I didn't want to chime in since it was the same old question, but it seems to have gotten pretty far off topic. I prefer the VFC H&K 2015 mechbox over the Krytac, as does Steve. I've seen one or two broken Krytac gearboxes, I've never seen a failure of a stock 2015 VFC. While Krytac does have slightly better magnets than the VFC motor, their magnets are still not even close to good. As for externals, Krytac is a no for me because I don't want an engraved squid on my gun. That is not to say Krytac is bad, they're great but just not for people like me.
G&P has more variety in externals, but the attention to detail from G&P is just...... Just no. Their buffer tubes are over sized. That's good if you wan't a poorly fitting stock to not wobble, such as any (real steel included) Magpul stock. If you want to fit a Mil-Spec stock, nope. Their pistol grips don't always offer the correct motor angle, their motors are pretty much the worst motors on the market. The mock bolt on a G&P doesn't work because they're too lazy to catch up on airsoft AR designs, and they use their GBB spec dust covers. Their receiver threading is also off. Internally, G&P parts fitment is almost as bad as guns from mainland China. If I had a G&P, I would not leave a single thing stock, except maybe the nozzle and anti reversal latch.
VFC is by far the best base for higher end builds. In the gearbox itself, you can keep a lot of the stock components if you are doing a high performance setup. Parts fitment is good. The nozzle doesn't wobble a lot, when you open the gearbox everything stays in place, the air seal out of the box is fantastic. I cannot say any of those things for G&P.
I don't know of any AEG builders in Canada that I would trust to do work for me but prefer a base other than VFC. Likely because any person that really cares about attention to detail would pick VFC.
