With two distinct styles of crowned .22LR barrels, customers can select the BRO-22 barrel that best suits their individual needs. Both barrels are 18 inches long, made from 4150V nitrided steel for durability and feature a Bentz Chamber with a 1:16 6-groove twist rate, which is laser-engraved for easy reference. These barrels are designed for precision and reliability, though they are not compatible with AR-22 style rifles.