SIG Sauer M400 SDI Review: Capable and Ready Duty Rifle

Today we take a look at one of SIG Sauer's newest AR rifles. This has been an excellent shooter and makes a great case for an all around duty gun. Its perfect for someone who is looking for an AR that is ready to rock right off the shelf.
What do you think of the M400 SDI? Have you shot one? Do you own one? Let us know in the comments below!