The Diamondback Carbon DB10 Rifle Combo provides the flexibility of two rifles in one package. The main rifle is chambered in 5.56 NATO, featuring a 16-inch barrel, black hardcoat anodized finish, and a 12-inch M-Lok rail for accessories. The additional complete upper assembly is chambered in .300 AAC Blackout, allowing for an easy caliber change. Both setups utilize a carbine-length gas system and a shot-peened, MPI Mil Spec 8620 bolt carrier. This combo also includes a Gen3 PMAG 30-round magazine for 5.56 NATO and a 300 Blackout PMAG.