gun RML 64 pounder 64 cwt gun RBL 40 pounder Armstrong gun RBL 20 pounder Armstrong 13 & 15 cwt 1-inch Nordenfelt gun Armstrong Gun United States 18-inch/48-caliber Mark 1 gun (never used) 16-inch/50-caliber Mark 7 gun 16-inch/50-caliber Mark 2 & 3 guns (used as coast artillery and on the Iowa class battleships) 16-inch/45-caliber Mark 6 gun 16-inch/45-caliber Mark 1, 5, & 8 guns 14-inch/50-caliber Mark 4, 6, 7, 11 & B guns 14-inch/45-caliber Mark 1–3, 5, 8–10, & 12 guns 13-inch/35-caliber Mark 1 & 2 guns 12-inch/50-caliber Mark 7 gun 12-inch/45-caliber Mark 5 gun 12-inch/40-caliber Mark 3 & 4 guns 12-inch/35-caliber Mark 1 & 2 guns 10-inch/40-caliber Mark 3 gun 10-inch/31-caliber Mark 1, 10-inch/30-caliber Mark 2, & 10-inch/35 caliber Mark 1 guns 8-inch/55-caliber Mark 71 Major Caliber Lightweight Gun (MCLWG) 8-inch/55-caliber Mark 9, 12, & 14–16 guns 8-inch/45-caliber Mark 6 gun 8-inch/35-caliber Mark 3 & 4 guns 8-inch/30-caliber Mark 1 & 2 guns 7-inch/44-caliber Mark 1 & 7-inch/45-caliber Mark 2 guns 155-mm/62-caliber Mark 51 Advanced Gun System (AGS) 6-inch/54-caliber Mark 12, 14, 15 & 18 guns 6-inch/50-caliber Mark 6 & 8 guns 6-inch/47-caliber Mark 16, 16DP, & 17 guns 6-inch/40-caliber Mark 4 gun 6-inch/30-caliber Mark 1–3 guns 5-inch/62-caliber & 5-inch/54-caliber Mark 45 guns 5-inch/54-caliber Mark 42 gun 5-inch/54-caliber Mark 16 gun 5-inch/51-caliber Mark 7–9, 14, & 15 guns 5-inch/50-caliber Mark 5 & 6 guns 5-inch/40-caliber Mark 2 & 3 guns 5-inch/38-caliber Mark 21, 22, 24, 28–30, 32, 37, & 38 guns 5-inch/31-caliber Mark 1 gun 5-inch/25-caliber Mark 10, 11, 13, & 17 guns 4.7-inch/50-caliber Mark 1–3 guns (Armstrong) 4-inch/50-caliber Mark 7–10 guns 4-inch/40-caliber Mark 1–6 guns 76-mm/62-caliber Mark 75 gun 3-inch/70-caliber Mark 26 gun 3-inch/50-caliber Mark 2, 3, 5, 6, 8, 10, 17–22 guns 3-inch/23-caliber Mark 9, 13, & 14 guns 3-inch/21-caliber Mark 1 gun (field gun for United States Navy and United States Marine Corps) 57-mm/70-caliber Mark 110 Mod 0 Bofors gun 40-mm/56-caliber Mark 1, 2, & M1 Bofors guns 30-mm Mark 46 Bushmaster II gun 1.1-inch/75-caliber gun 25-mm/87-caliber Mark 38 Machine gun system 20-mm/76-caliber M61A1 & 20-mm/99-caliber M61A1 Gatling OGB gun 20-mm Mark 16 gun 20-mm/70-caliber Mark 2–4 Oerlikon cannons See also List of artillery List of the largest cannons by caliber References External links NAVWEAPS - Naval weapons of the world, 1880 to today (retrieved 2010-02-01) Naval Naval guns