Longer Rail
16" barrel
Redesigned charging handle
Ambi safety
Hopefully the MR556 will feature all these new goodies
http://images2e.snapfish.com/2323232...79%3A345nu0mrj
http://images2c.snapfish.com/2323232...29799345nu0mrj
http://images2e.snapfish.com/2323232...79%3B345nu0mrj
http://images2e.snapfish.com/2323232...7%3A2345nu0mrj
http://images2e.snapfish.com/2323232...7%3A3345nu0mrj
http://images2e.snapfish.com/2323232...7%3A4345nu0mrj
http://images2e.snapfish.com/2323232...7%3A5345nu0mrj
http://images2c.snapfish.com/2323232...7%3A6345nu0mrj
http://images2e.snapfish.com/2323232...7%3A7345nu0mrj
http://images2c.snapfish.com/2323232...3A%3A345nu0mrj

