Original U.S. Cold War Navy 3 Inch .50 Cal Mark 29 Armor-Piercing Capped Round - Inert Headgear After the Second World War

After the Second World War

the barrel was remounted to the original receiver

reading JSA / 1901

but is seen on replaced barrels from the 1960s and 1970s

There is a heat lot number below this

Original U.S. Cold War Navy 3 Inch .50 Cal Mark 29 Armor-Piercing Capped Round - Inert Headgear After the Second World WarOriginal Item. Only One Available. The 3 inch . 50 caliber gun (spoken "three inch fifty caliber") in United States naval gun terminology indicates the gun fired a projectile 3 inches (76mm) in diameter, and the barrel was 50 calibers long (barrel length is 3 in 50 = 150 in or 3. 8 m). Different guns (identified by Mark numbers) of this caliber were used by the U. S. Navy and U. S. Coast Guard from 1890 through the 1990s on a variety of combatant and