WK-180c owner here,
- New charging handle designs, I have the SBI improved version and it's good but more variety is always preferred, maybe something oversized or shaped differently (i.e dog leg shape, curved like a 10/22 or AK, etc.)
- I definitely agree on a new bolt catch/release, the Kodiak and RWA designs are fine but something with a longer handle/catch or reversible would be nice. It would be awesome if I could reach the bolt release using the thumb of my trigger hand without breaking my grip.
- Maybe a 45 degree throw safety selector? I may be mistaken but I don't think an AR-15 selector would work.
- More WK-180 compatible handguards, I have your super-MLOK handguard and it works great but some more options would be awesome (i.e minimalist handguard with no picatinny on top, color matched to factory finish, etc.), I don't know if it would be cost prohibitive or not but machining in a port on longer hand guards so we can still access the gas system without handguard removal would be awesome.
- A new front takedown pin (similar to the one made by RWA) would be a nice addition as well, I often find it easier to separate the two receivers entirely for maintenance and it's quite a fuss messing around with that e-clip every time.
- Consider stocking a wider variety of AR-15 pistol grips without beavertails, since this is what fits best on the WK/MS platform.
- I'm sure plenty of people would want a nice alternative to the 3-D printed WK deflectors out there, I'm fine with some marks on my rifle so it's not something I would purchase personally, plus I run my charging handle on the right side so lots of the current designs wouldn't work for me.
That's about all I can think of at the moment. Looking forward to what you come up with!