The DDM4v1, the original Daniel Defense Rifle, is built with a Cold Hammer Forged 16" M4 Profile Barrel with a Carbine gas system.
The Daniel Defense M4 Carbine V11 Lightweight, based on the popular V9 series, was designed for shooters who prefer the benefits of the KeyMod system integrated in the new SLiM Rail™ (Slim Lightweight Modular).
Daniel Defense M4A1. .223Rem/5.56mm, 16" (14.5" with Pinned Brake) Hammer Forged Barrel, Daniel Defense Vertical Grip, Flat Dark Earth, 30rd
Daniel Defense Mk12. .223Rem/5.56mm, 18" Barrel, Daniel Defense Furniture, Stainless Steel, 30rd