The PSE Carbon Air Stealth Mach 1 is made in the USA and built with a carbon riser that has a longer new-design. Its unidirectional carbon fiber elements makes for the highest efficiency of all-carbon bows that are available. This bow comes with comfort, better accuracy and more stability due to its laid-back limbs and a grip area that has been redesigned. The technology is Proven Evolve Cam which is fast, smoother and provides pinpoint precision. Brace height is 6 1/8" with axle-to-axle length of 32 1/8". The ATA/IBO speed is 332-324 FPS with a let off of 80-90%.