Dose anyone know what flip up iron sights to buy for this gun that are accurate? Sig themself do not offer sights for the newest model.

Just about any AR height set will work, but the front post may not have enough adjustment to zero 9mm at 25 yards, and it will shoot low. In that case you may need to file down the front sight, so keep that in mind.

For AR's I use Magpul MBUIS Pros.

But, given the slightly higher top rail on the MPX vs. an AR, Troy micros that are shorter than standard AR sights may be an interesting option.

It appears Troy dose not offer M-lok

The top rail appears to be picatinny, based on the photo of the MPX-K on the sigsauer website. The M-Lok portions are at 3, 6, and 9 o’clock.