I know you ' re being intentionally dense , but just in case it has been found multiple , multiple times that a lot of people who plead guilt aren ' t guilty . There is a lot of pressure to admit crimes in order to lessen punishment . IMO , far too much . Plea bargains basically reward guilty people to pleading guilty and rolling on others and if you don ' t plea guilty and don ' t have the resources for a great defense all that can bury someone . <| sep |> There was an experiment revolving around barrel length and accuracy and found that the shortest barrel you can have that 5 . 56 is 10 . 5 . The M 4 has a 14 . 5 barrel , so they ' re OK . Also , the military uses ammo that is tuned for their rifles . They don ' t go down to WalMart and buy some Remington green or Winchester White Box rounds and think that ' s good enough . 1093