I do not think the MK9 will make it into production. However, the MK13 and the MK14 are going full steam ahead. The MK13 is expected to be ready in 8 to 12 weeks. The MK14 is similar to the Mk13 but the MK14 will be full MLOK at the 3, 6, and 9 positions.
The MK13 will be a slimmer style similar to the MK4 while the MK14 will be a slimmer version to the MK8.
-Geissele Customer Service