Evolution Gun Works Whitely Spacestock Weight Aluminum. These Evolution Gun Works Rifle Parts are designed for use with the patented Whitley Spacestock which is arguably the most innovative AR accessory in the market. However the impact it has on your overall gun control is so minimal that it could hardly be called a gun control violation. However the lack of proper weights can cause serious issues for your build. That's why these EGW Whitely Spacestock Grey Weights exist. Add some balance to your build with these Evolution Gun Works (EGW) Whitely Spacestock Weights. Specifications for Evolution Gun Works Whitely Spacestock Weight: Manufacturer: Evolution Gun Works Color: Grey Package Contents: Evolution Gun Works Whitely Spacestock Weight Evolution Gun Works 32011: Whitely Spacestock Weight Aluminum