Hawke XB 3x 32mm Crossbow Scope - XB SR - Scopes designed to withstand the rigours of crossbows with reticle systems guaranteed to make you a better shot! 20 yard zero with 10 yard aim points out to 70 yards. Bracketing system measures 17 inches typical whitetail deer from top of back to brisket. Calibrated for 340 fps. Nitrogen purged. Shockproof. Waterproof. Fog proof. Hawke No-Fault Lifetime Warranty.