Questions involving The Unique Guns from the End of the Battle of Monte Cassino Event

Mess Room
1
  1. Can you get all the Rifles during this Event, and if Not, then which ones do you suggest that I get, and why?
  2. How do I get one of those unique rifles, after I receive an order that I can use to buy a weapon?
2

You can get 1 BR4 gun and 1 of BR2 ,or 3 of the BR2