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The Atlas rail series features an slim profile for improved ergonomics, and superior weight savings. With a static top rail optimized for mounting optics, and multiple contact points for a hex key mounted modular rail system on the sides and bottom, The Atlas rail is the ideal solution for any AR owner looking for speed, and mission flexibility. It uses a hex key secured barrel nut clamp, and proprietary barrel nut, for even more weight savings and increased ease of installation.