Just watch the antennae connections.
- The MSM466-R (ruggedised outdoor) has the large N type connectors.
- The MSM466 (internal) has the smaller RP-SMA type connectors.
The outdoor antennae that HP sells have N type connectors; to connect to an internal MSM466, you will need an adapter or suitably equipped RF/Cable guy to reterminate, provide extensions, etc. The adapters are not sold by HP.
PS: The OMNI antennae we used in the waves at the beach are still working a year later!