Check the listing for details. 9mm 9x19 Muzzle Device Alignmet Rod Suppressor Gauge. Condition: New. Listed at 43.00 USD. 10% off for active and retired military, law enforcement, fire, and EMS. Message for details The True Bore Precision suppressor tool will ensure proper concentricity along the bullet flight path when firing suppressed. This rod most closely represents the bullet flight path and will show any misalignment, if present. Proper suppressor to bore alignment is crucial in eliminating the potential for baffle strikes. Tolerance: -0.0005" to 0.0005" These rods are machined under bore diameter to allow easy insertion and variation between different bores. Rods are made from tool steel with a Rockwell of B90. These are slightly softer that regular steel to reduce the chance of damaging your barrel or suppressor10% off for active and retired military, law enforcement, fire, and EMS. Message for details The True Bore Precision suppressor tool will ensure proper concentricity along the bullet flight path when firing suppressed. This rod most closely represents the bullet flight path and will show any misalignment, if present. Proper suppressor to bore alignment is crucial in eliminating the potential for baffle strikes. Tolerance: -0.0005" to 0.0005" These rods are machined under bore diameter to allow easy insertion and variation between different bores. Rods are made from tool steel with a Rockwell of B90. These are slightly softer that regular steel to reduce the chance of damaging your barrel or suppressor