ENHANCED GEOMETRY- After carefully reviewing industry standard, we calculated for improved ergonomics and decreased install time. We further improved strength and reduced weight of the product to offer up the best possible magazine catch bar on the market. 7075 BILLET T6 ALUMINUM- This product is precision machined, not cast, from the strongest made 7075 T6 Aircraft Aluminum. It is then ANODIZED for improved finish and corrosion resistance. LIFETIME GUARANTEE- We are proud of our work. Our products come with a 100% satisfaction Guarantee you can trust.