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 For active self-protection today when you are facing a shooter and you are a policeman you may want a gun with more power than just a measly little pistol in your hand. So this guy has a gun and the police are called because he was making political comments and fired a gun like three times so they get there and they stay actually pretty far away they emptied four rounds into the guy 2 of them from a r and 2 from a normal pistol the news said that the man died right there on that ground. The police did most of their work to perfection but some places like if you're looking around don't keep your eye on the red dot or iron sight by the way the red dot is said to be much better than iron sights but whatever look around keep that red dot in your spherical vision so you can still line up but don't keep your eye looking through the sights.