lead up

  1. M

    will 22lr kit "lead up" 5.56 barrel/foul gas tube?

    got a 22lr kit for ar, just wondering if its hard on an ar to run this then switch back to 5.56/.223? if its gonna be a pain to clean up after usin the rimfire ill just keep it for a ruck emergency kit....but it would be neat for cheaper training use if its not horrible on the rifling and gas...