Arms & the Citizen

My sense is that your duty as a citizen, which includes militia service -- service you should be thinking about as a likely reality in the near future -- suggests that you should own an AR-15 platform in 5.56mm NATO.  That is the rifle that will allow you to interoperate most effectively with regular and National Guard forces, while tying into their supply chains as necessary.  Plus, they have innumerable experts who can train you as opportunity arises if you are not fully trained on the weapon yourself.

Colonel Kurt wrote a longer piece.  He recommends a minimal three-gun setup, with the AR-15 filling the rifle role.