Description
90mm T33E7 AP-T Projectile without Windscreen
Item Overview
This 90mm T33E7 AP-T projectile is an American armor-piercing tracer design associated with the M318/M318A1 ammunition family. It belongs to the Cold War era of tank-gun development and suits collections focused on American armored vehicles and military ammunition.
Identification and Features
The original design used a solid, hardened steel body with a flat base and a short, curved nose. A rotating band engaged the gun’s rifling, which gave the projectile its spin. The base was threaded to receive a tracer. These construction details help explain how the projectile combined armor penetration with a visible flight path.
Original Function
AP-T stands for Armor-Piercing Tracer. The service projectile relied on impact energy to penetrate armor and contained no high-explosive bursting charge. Its rear tracer produced a visible light during flight, helping crews observe the shot’s path. A lightweight aluminum windscreen normally covered the steel nose to improve its shape for flight.
Product History
The T33E7 belongs to the development history of the American T33 series of 90mm armor-piercing ammunition. A 1958 Army report on experimental tank armor cites a T33E7 test study dated June 19, 1956. Later Army manuals associate the designation with M318/M318A1 AP-T ammunition. These records connect the design to early Cold War work on tank ammunition and armor protection.
Documented Applications
Army ammunition references list the M36, M41, and M54 90mm guns for this ammunition family. Their parent vehicles were the M47 Patton with the M36 gun, the original 90mm-armed M48 Patton series with the M41 gun, and the M56 Scorpion with the M54 gun. These applications link the projectile to both armored tanks and light airborne equipment.
Equipment History
The M47 entered American service in 1952 after the Korean War created an urgent need for improved tanks. It combined a modified T42 turret with an M46 hull. The M48 began replacing it in 1953 and introduced a new hull, turret, and suspension. The M56 followed a different approach, placing a 90mm gun on a small tracked chassis designed for airborne troops, with little protection for its crew.
Weapon-System Background
The M36 developed from the earlier M3A1 90mm tank gun and increased its power. The M41 incorporated a bore evacuator, blast deflector, and a turret-mounted recoil system. The M54 carried 90mm firepower on the lighter M56 vehicle. These weapons formed part of a broader shift toward stronger tank guns and improved ammunition during the 1950s.
History of Use
The parent weapons served in several important Cold War roles. M47 tanks equipped American allies, including West Germany from 1955. M48 tanks served American and NATO forces in Europe and later supported Army and Marine Corps operations in Vietnam. The 1st Infantry Division used M48A3 tanks for road security and convoy protection. M56 Scorpions also served the 173rd Airborne Brigade in Vietnam, chiefly in infantry support.
Condition
This is an inert projectile supplied without its windscreen. The missing cover leaves the steel nose exposed for inspection and display.
Ideal For
A suitable addition to armor-piercing projectile collections, Patton tank displays, and studies of Cold War ordnance. Displaying it beside an intact example or a period ammunition diagram helps explain the separate roles of the steel penetrating body and lightweight nose cover.
Approx length 10", Approx width 3.5", Approx height 3.5", Approx weight 23lbs.
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