I have the full stock modeled already. I'll post an update tomorrow once I finish some more parts. I wanted to include a marksman type stock as well like https://s3.amazonaws.com/coppercustom_website/wp-content/uploads/2014/11/RSR-MPIMAG307B.jpg
I also thought this stock looked pretty neat too as a recoil compensating type: http://www.thefirearmblog.com/blog/wp-content/uploads/2012/12/frs_15_2-tfb.jpg
I was probably going to go that route with the magazines as well. I want to include the 20 round straight mag too, maybe give it a benefit of lighter weight? Four magazine sizes isn't overkill I think.
Obviously I have the iron sights done already. I'm not going to use the modern flip sights for this as the entire carry handle will act as the iron sight. Any relevant optics will remove it. An ACOG is a necessity for this I think since it is such an iconic optic and fits perfectly with this weapon. I may do an eotech for the reflex sight too but I'm not certain on that yet. The front sight will still be there so an eotech would give some height to help balance that out and not completely be in the way. Telescopic sight will of course be added and will cover all the varieties. The great thing too is that these optics will be reusable across different weapons I make.
Muzzle-wise I'll probably do the standard flash suppressor (already done), compensator, muzzle break, and suppressor.
It's a lot of parts but it will be worth it in the end!