The Madbull Daniel Defense 16" M4 Profile Outer Barrel is is cold hammer forged from high quality metal and features fully licensed trade marks and engravings. The make, caliber and rifling of the barrel are all beautifully engraved on this barrel and add to the overall look and realism. Unlike some lesser outer barrels, the Madbull Daniel Defense outer barrel is made with extremely tight tolerances to ensure maximum barrel stability. The fit and finish of this barrel easily surpasses low quality barrels that you might find in most clone AEGs, if you are looking for a outer barrel that looks great and functions perfectly then this barrel will definitely fit the bill.