While most AR-15 pistol grips are molded from polymer, Executive Ordnance went a different direction. Theirs is machined from 7075 aluminum billet, hard anodized, and fitted with interchangeable G-10 panels. This is certainly not something everyone needs but they are really unique and they look great.
G-10 is a great material for this type of application. It is extremely durable, relatively lightweight, impervious to most solvents, available in a ton of colors, and easily machined for texture. Each grip has three G-10 panels – two sides and a front strap. The panels bolt to the aluminum chassis and are interchangeable so that the texture and colors can be changed to suit the user.