http://en.wikipedia.org/wiki/Chain_gun
那支是小口徑的鏈槍 (chain gun) 0.30 英吋 7.62 mm
http://en.wikipedia.org/wiki/M197_Gatling_gun
這幾隻比較大
http://en.wikipedia.org/wiki/M242
http://en.wikipedia.org/wiki/Bushmaster_III


http://en.wikipedia.org/wiki/Gatling_gun
噴射戰機用的機炮是 20 mm 炮 , 炮+電源+ 1,200發 20 mm 砲彈+外殼 ... 大概重 733 ~ 780 kg.
http://en.wikipedia.org/wiki/M61_Vulcan
http://en.wikipedia.org/wiki/Gryazev-Shipunov_GSh-6-23