Hard-sided cases offer the most protection for your firearm. As the name implies, they have a hard exterior that protects your gun from outside forces. These cases feature foam padding to protect your gun from impacts as well as keep them secured and in place. Different cases have different foam densities. MLINE Rifle Cases are constructed from high-grade ABS plastics and dense lined Aluminum - all featuring (x2) three-digit Combination Locks as well as (x2) Key-Latch Locks.