The Holosun 510C SPACER Lower 1/3 Co-Witness FDE Spacer for HS510C is a must-have accessory for shooters seeking to achieve a lower 1/3 co-witness with their Holosun HS510C optic. Constructed from 6061 T6 aluminum, this spacer is both lightweight and durable, ensuring it can withstand the rigors of regular use. The flat dark earth finish not only adds a tactical aesthetic but also provides additional corrosion resistance. This spacer is designed to raise the HS510C optic to the desired height, allowing for better sight alignment and improved shooting accuracy. Easy to install, it is an excellent addition to any shooter's gear.