Athlon Optics Rangecraft Velocity Pro Radar Chronograph 2.4 in. It picks up the projectiles via Doppler radar thus eliminating the need to mount the Rangecraft Velocity Pro to the weapon. This means it won t affect your zeroing or barrel harmonics so your accuracy remains the same. Since the unit isn t triggered by a muzzle blast it can pick up on projectiles from firearms with suppressors muzzle breaks compensators and other muzzle devices. The Rangecraft Velocity Pro can measure projectile velocity between 65 fps and 5000 fps allowing users to measure the velocity of a massive assortment of projectiles. Specifications for Athlon Optics Rangecraft Velocity Pro Radar Chronograph 2.4 in Display: Manufacturer: Athlon Optics Battery Type: Lithium Ion Quantity: 1 Weight: 4.7 oz Condition: New Package Contents: Athlon Optics Rangecraft Velocity Pro Radar Chronograph 2.4 in Display GunTuber Holiday Picks 2025 Handpicked products from your favorite content creators. Click Here to Explore the Picks. Athlon Optics 707301: Rangecraft Velocity Pro Radar Chronograph 2.4 in