Manufacturer Part Number (MPN) : 18BX370RX-NIRThe American made CamX A4 Crossbow is the quietest crossbow on the market. At 370 FPS the CamX A4 is deadly accurate with the tightest groups at even 100 yards. The A4 suspension system features a patent-pending swingarm system that keeps the string, cable, and cams inside of the tips of the limbs. Sit back, relax, and enjoy the sound of silence with the CAMX A4. Included with the bow, is the ARC 370 4x32 Illuminated crossbow scope. The ARC features two key technologies: SER (Short Eye Relief) and ARC (Arrow Range Compensation). SER 1 1?2” eye relief permits comfortable scope positioning. compact and lightweight other ARC features include fully coated optics, cross/dot reticle, 1/4” click turrets at 20 yards, 30 yard parallax free, independent eye piece focus and is fog proof, waterproof, shockproof, and carries a lifetime warranty. The A4 brings a shootability experience like no other to the crossbow hunter. Speed: 370 FPS Mass Weight: 7LBS 8OZ Axle to Axle Cocked: 10.5 inches Length: 35 inches Power Stroke: 13 inches Arrow: 18 inches.