Iceni

Aug's are defiantly one of the oddities of the airsoft world.

Unlike other platforms like the m4 where the gearbox is locked in place and you reference everything to the gearbox, Augs have no reference or fixed points internally. It's more of a relationship.

The only real fixed point is the back of the spacer on the back of the hop. It's that engagement that sets everything else up and it took me a while to work it all out.

The hop position in the upper, Irrelevant. It just needs to move freely.
Magwell plate, irrelevant. It'll self position to the mag, and line up to the hop automatically.
Gearbox position, irrelevant. The hop will set the distance and put load onto the gearbox plate, I actually killed a magwell plate when I first got an AUG thinking shimming a gearbox would be a good idea, it's not. Let the hop spring do all that work.
Even the tappet plate/airnozzle are largely irrelevant. You need just enough space to feed well, but if it's pushing too hard on the hop the tappet spring is weak enough that it seats correctly anyway. And doesn't push the gearbox off the hop.

It's a weird gun to understand. But also very simple and very clever when you do understand it. It's by far my favourite internal design. You can set everything on the gearbox external to the body, even motor height. And the rest just works if you let it work. Most Augs i've looked at second hand that have issues all relate to the hop not moving correctly, and people going round in circles trying to fix a problem they created.

Hop fitted. High torque motor fitted. Sound deadening fitted. It's EVIL...😂

Thank you for your guidance. I've printed it out and ingested every word.👍

Glad it's all working out Have fun with it