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Harold Hutchinson,We Are The Mighty

While we love the 30mm GAU-8 Avenger on the A-10 for the BRRRRRT it brings, we also know that it's not exactly the biggest gun to ever take to the skies. In fact, several planes have packed bigger guns, like the XA-38 Grizzlyarmed with 75mm firepower or some versions of the B-25 Mitchell, which pack .50-caliber machine guns.One of the biggest guns to ever be attached to a plane is the 105mm howitzer on the AC-130 Spectre gunship. Yeah, Warthog fans, I'll say it: the AC-130's biggest gun makes the GAU-8 look like a cute little pop gun.Here's the scoop on this cannon that can really make life a living hell for bad guys on the ground.

AC-130U Spooky gunship crew members from the 4th Special Operations Squadron, based at Hurlburt Field, Florida, load the 40 mm Bofors cannon, background, and 105 mm howitzer cannon, foreground, during a training mission.Wikimedia CommonsThis gun is officially known as the M102 howitzer. It's been around since 1964, when it was acquired by the Army for airborne and light infantry units, replacing the World War II-era M101 howitzer.The M102 has a top range of roughly nine and a third miles and can fire ten rounds per minute in a rapid-fire mode before settling down to a tamer three rounds per minute.While the lightweight M119 has replaced the M102 in many of America's light units since it entered service in 1989, the M102 is still active aboard the AC-130. The howitzer has been on AC-130s since 1971.

US Air Force aircrew members fire a 105 mm M102 howitzer on a AC-130U gunship during Emerald Warrior, Hurlburt Field, Florida, March 6, 2012.US Air Force/Staff Sgt. Jonathan SnyderThe M102 has seen action on the ground in Vietnam, Grenada, Desert Storm, and Operation Iraqi Freedom.While many of these howitzers will never see active service on the ground again, many have a long life ahead on AC-130 gunships, both the AC-130U and the AC-130J.You can see a video of the M102 being tested in its ground-based mode by the Army in the video below!

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