>>634
20mmなら

http://www.doublepiping.com/items/%e3%82%a2%e3%83%83%e3%83%97%e3%83%ab%e3%82%a6%e3%82%a9%e3%83%83%e3%83%81%e3%81%ab%e3%80%902nd%e3%80%91%e3%83%a2%e3%83%87%e3%83%ab%e3%81%ae%e6%99%82%e8%a8%88%e3%83%99%e3%83%ab%e3%83%88%e3%81%8c/