PTI Tech developed and produced the FSIK using MIM, the best manufacturing technology to address the complexity of the component. Other processes, such as casting or machining, would not have been practical due to the complex geometry required to reinforce the small component. To meet weight and hardness requirements, PTI Tech proposed an innovative I-beam design concept. The webbed design provided equal strength to a previous solid version of the U-bracket, while reducing weight by 30%. PTI Tech’s design and manufacturing innovation impressed military inspectors, who cited that they had never witnessed weapons of this kind survive five-foot drop tests while fully retaining functional 100-200 round magazines.