Hallconnen

The Hellsing ARMS Anti-Tank Cannon 'Hallconnen' (ハルコネン,), often referred to as simply "The Hallconnen", is the preferred firearm of Seras Victoria for much of the Hellsing series. This weapon's name is rendered as "Hallconnen" but actually pronounced "Harkonnen" and is a reference to the primary antagonists of the novel Dune, Baron Vladimir Harkonnen (the spelling discrepancy is the result of the Japanese pronunciation of "Hallconnen").

She is the only one who uses it, and is probably one of the few who can because of its weight; Seras' sharp precision and superhuman strength are ideal for using it. The Hallconnen is stated by Walter to have enough firepower to destroy nearly anything other than a main battle tank, as well as being superior to the majority of military weapons.

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Weighing 120 lb. (approx. 60 kg) unloaded, the 30 mm, single-shot breech loader cannon uses various types of shells, including depleted uranium with silver for piercing armored targets and incendiary napalm rounds for destroying large groups of opponents both on land and in the air.

The cannon is almost hilariously oversized, but Seras soon handles it like a normal rifle because of her strength as a vampire. Weighing 120 lb. (approx. 60 kg) unloaded, the 30 mm, single-shot breech loader cannon uses various types of shells, including depleted uranium with silver for piercing armored targets and incendiary napalm rounds for destroying large groups of opponents both on land and in the air. Carrying this weapon, the vampirically-enhanced Seras serves perfectly as long-range fire support. Her immense strength also allows her to use the weapon while moving; sometimes, especially in the manga, she wields it with an extraordinary ease, even firing over her shoulder.

The subtitles state that "It's combat effective against all ground and aerial weapons except main battle tanks." The barrel is connected to the lower reciever by an hinge at the front of the lower reciever. To reload the barrel drops down at the forward end and moves up at the rear end, exposing the breech end of the barrel where spent cases are removed and fresh shells inserted (like a double barrel shotgun except with one, much larger barrel.

The size of the Hallconnen can be worked out by referencing the scene where it is first introduced by Walter, who stands it up next to himself. Walter's height is given as 191 cm, thus the Hallconnen can be worked out to be approximately 237 cm long, comparable to similar-caliber anti-tank guns.

Usage
This is the weapon that Walter gives Seras in episode 5, "Brotherhood" and the OVA shows the same scene as well, in the 2nd episode. For most of the series, Seras primarily uses this weapon; even after Hallconnen II's existence. However, it probably means that Hallconnen 2 was mostly made to take down Zorin's zeppelin. The Hallconnen's large size sometimes makes it hard to transport, a feature wryly remarked upon by Seras. Nevertheless, it continues to be her preferred weapon until it is destroyed.

In 1999, Seras had only used the Hallconnen canon against Zorin; and was specifically last seen using the weapon during the last stand against Zorin's battalion, and had never used this again during the rest of the "war". However, after the 31-year-long timeskip, and during Alucard's return, Seras was seen using two of these, meaning that it was repaired.

Stats

 * Caliber: 30mm Uranium Ammunition
 * Total length: 233mm
 * Weight: 83kg
 * Magazine: 1 Bullet

Name
Seras' signature weapons are named after the main antagonist of Frank Herbert's novel Dune, Baron Vladimir Harkonnen. In Hellsing: Ultimate VII (around 11:30 minutes) the name "Vladimir Hallconnen" can be read engraved on the weapon. And there is an appearance of the gun's "spirit" during dream sequences in the manga (and thus OVA) and episode previews in the anime; the spirit in question bears a strong resemblance to Baron Harkonnen from David Lynch's film adaptation of the novel. Originally and in many of Hellsing's official sites, including some shots from all of Hellsing's media; TVA, OVA and Manga, Seras' weapon is clearly spelled out as "Hallconnen". Also, the official English dub of the OVA and anime pronounced it as "Harkonnen", adding to the confusion whether the name of Seras' weapon is "Hallconnen" or "Harkonnen". Nevertheless, because of the fact that it's spelled by Hirano as "Hallconnen", it's safe to assume that it's the actual name of this weapon.

Trivia

 * Before gaining the Hallconnen, Seras used a relatively smaller rifle, firing 13.7mm rounds, as is seen written on the gun in the manga. In the manga this gun is unnamed but the letters Hellsing 13.7mm 'BAERLKS' are spelled out on its side; in the OVA, however, the gun has Hallconnen written in the same place.