CNC Machined from Delrin tubes, the CST Rimfire Receiver Bore-Guides are held to a tight tolerance for a perfect fit through the cleaning port in the rear of all CST Rimfire Receivers.  Additionally, the Bore-Guides have a through hole sized for a precision fit on rimfire cleaning rods, ensuring the cleaning rod stays in proper alignment.   For those shooters with top-shelf barrels who prefer traditional barrel cleaning from the chamber side, this Bore-Guide is a must!

Helpful Hint:  When using a brush to clean the barrel, slip the Bore-Guide onto the cleaning rod first, followed by the brush.