Mergers, particularly among defense companies, take time. Why? Simply because you have to re-market yourself and your company to the Contracting Officers. Not to mention the integration of different company cultures. And any existing contracts have to be reviewed if they require clearance or special permits.
We are asking two companies to finish a merger in under a year. I've seen defense acquisitions before - prime example L3's takeover of MPRI. And that took three years! Again, I repeat, patience is key.