Surefire bore rods are essential tools designed to ensure proper concentricity along the bullet flight path when firing with a suppressor on a new platform. These rods closely represent the bullet's trajectory and will indicate any misalignment, if present. Surefire advises operators to verify the alignment of the barrel, adapter and suppressor on any new build or previously untested setup. Surefire bore rods provide the most effective method for this verification. Select the appropriate rod corresponding to your rifle or carbine's caliber. High-precision-machined rods engineered for optimal accuracy in verification processes To validate the setup before initiating the first round of firing Carefully guide the rod through the pre-installed suppressor of a weapon that has been verified as unloaded An equal spacing should be observed between the bore of the suppressor and the centered rod The SureFire-certified method for confirming optimal suppressor alignment The precision-engineered rod will accurately detect and display any deviations in alignment, ensuring optimal performance and adherence to stringent tolerances Thermally processed austenitic stainless steel alloy Manufactured in the United States