Diamondback DB Barrel 5.56x45mm NATO 16" 1:8 Twist Black Nitride - Carbine Length Heavy Profile

The Diamondback DB Barrel is a heavy-profile replacement barrel chambered in 5.56x45mm NATO, built for AR-15 platforms. Cut to a 16" length from 4150 Chrome Moly Vanadium (CMV) steel and finished in black nitride, it carries a 1:8" twist well-suited to stabilizing a wide range of common 5.56 projectile weights.

The carbine-length gas system makes this barrel a direct fit for standard AR-15 carbine builds, while the heavy profile contour adds mass around the chamber and along the bore for improved heat dissipation and added rigidity during extended strings of fire. Diamondback offers this DB556C16H50B8NY-R configuration as an OEM-style replacement supplied without muzzle device threads, giving the builder a blank muzzle to thread to their own specification.

Whether you're completing a new carbine build, replacing a worn factory barrel, or stepping up from a lighter contour, this Diamondback heavy-profile barrel delivers a durable 5.56 NATO chambering in a duty-capable configuration ready for the upper receiver of your choice.