text: CMF has been tested against larger-caliber armour-piercing rounds. S-S CMF panels were manufactured and paired with a ceramic faceplate and aluminium backplate. The layered hard armours were tested against .50 BMG ball and AP rounds at a range of impact velocities. The mild steel cores of the ball rounds penetrated one of the three samples but revealed the benefits of using multiple tiles over a single ceramic faceplate to limit the spread of damage. The hardened steel core of the AP rounds penetrated deep into the ceramic faceplate, compressing the CMF layer until the projectile was either stopped and embedded within the armour or was able to fully penetrate and exit the backing plate. The experimental results were compared to commercially available armour materials and offer improved performance with reduced weight. The CMF layer is estimated to absorb between 69 and 79% of the bullet's kinetic energy, in their unoptimized testing condition. At impact velocities above 800 m/s, the CMF layer consistently absorbed up to 79% of the impact energy. As the impact velocity increased, so did the effective strength of the CMF layer due to the strain rate sensitivity of the material. The mass efficiency ratio of the armours, when compared to rolled homogeneous armour (RHA), was calculated to be 2.1. The CMF hard armours can effectively stop an incoming round at less than half the weight of the required RHA. The weight savings afforded by using such novel armour can improve the fuel efficiency of military vehicles without sacrificing the protection of the personnel or the equipment inside.