A house gun. Family members around so shotgun is out. What would you suggest? What are your opinions about 5.56 and up? M-16 has parts everywhere but what other options are there? The following considerations are sorted by importance with #1 the most important. 1. Reliability 2. Report (blast) 3. Durability 4. Ease of maintenance 5. Price Are HK rifles (9mm, .45, 5.56) available to civillians?