By David Crane defrev (at) gmail (dot) com September 21, 2010 Updated on 9/22/10 A few days ago, our friend Eric Graves at Soldier Systems posted a very short blurb on a 7.62mm NATO (7.62x51mm NATO) modular battle rifle/carbine/SBR (Short Barreled Rifle) that Colt Defense is developing called the CM901. DefenseReview (DR) can confirm that … Continue reading Colt CM901 Modular 7.62mm NATO (7.62x51mm NATO) Battle Rifle/Carbine/SBR: It Exists.