The Heller was a Canadian antitank rocket launcher produced and fielded in 1954, replaced by M20 "Super Bazooka" and Carl-Gustaf recoilless rifle after 1967.

[2] The Heller fired a 3.2-inch (81 mm) high explosive anti-tank projectile that was capable of penetrating 11 inches (280 mm) of rolled homogeneous armor when struck at a 90-degree angle of impact.

[3] It replaced the US Bazooka, providing both longer range and greatly increased penetration.

HE A tk rocket penetration (homogeneous armour): over 11 inches at 90 degrees, Approx.

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