This universal gun cleaning kits are used to clean almost all handguns, rifles, and shotguns. Tested and proven, this cleaning kit is perfect for beginners and professionals alike. 13 bronze bore brushes fit 20GA 12GA. 45. 40. 357/.380/.38/9MM. 338. 325/8mm. 30/7.62MM. 270. 250. 243. 22. 17.