Here's my latest build, just need to get the barrel shortened and duracoated.
Parts/modifications:
Polished bolt/carrier
Red star arms adjustable trigger
worth every penny. I have it adjusted to mimic my Geissele SSA-E on my AR
RAM ambi mag release
I think I'd stick with the standard one though. I like the one on my Saiga 12, but haven't enjoyed this one as much
Ace adapter block
Ace AR style folding mechanism
Magpul CTR stock
Magpul MOE grip plastic welded to an ACE grip adapter
I like this configuration, but I'd be tempted to try out the US Palm grip over going through the work to plastic weld this one again
Ultimak gas tube/rail
Carolina shooter supply handguard
If had to mill out some slots on the side of the handguard to get this to fit with the ultimak. This would be easy enough to do with a dremel since the the area I had to cut lines up nicely with the slots. I also had to shave a little off the tenon of the handguard to get it to fit inside the AK receiver (not a big deal though since most parts require a little bit of fitting)
In addition to all of that, you have to cut off you handguard retainer (dremel)
Bolton gas block/fsb
With the MAK90, I had to ream it out to 0.635
Vortex Flash hider
Mojo rear sight
Tromix bolt on charging handle
The last thing I may add is the Linch left hand charging dust cover, I think this would finish it off nicely.