This original 7.62mm M134 / 40mm XM129 sighting station is a scarce surviving component from the XM28 Armament Sub-System used on the Bell AH-1G Cobra, one of the most iconic attack helicopters of the Vietnam War. Purpose-built for the Cobra’s nose-mounted armament installation, this is not generic aviation hardware. It is a specialized combat-aviation component tied directly to the early U.S. Army gunship program and one of the most recognizable helicopter weapon systems of the era.
The AH-1G Cobra was the U.S. Army’s first dedicated attack helicopter, developed to provide a fast, narrow-profile gunship platform capable of escort, close air support, and armed reconnaissance in Vietnam. One of the Cobra’s most distinctive features was its chin-mounted XM28 turret system, which gave the aircraft flexible forward firepower in a compact, highly maneuverable package. Original subsystem components from these early Cobras are increasingly difficult to locate today, and this sighting station is one of those rare pieces that immediately stands out to serious collectors and restorers.
The XM28 Armament Sub-System
The XM28 was a turreted chin-mounted weapon system fitted to the AH-1G, designed to carry combinations of the 7.62mm M134 Minigun and the 40mm XM129 grenade launcher. This arrangement gave the Cobra the ability to deliver both high-volume machine-gun fire and explosive antipersonnel fire from a flexible forward-mounted weapons package. In Vietnam, this weapon combination became closely associated with the Cobra’s role as a close-in attack and fire-support platform.
A sighting station like this was part of the gunner’s interface with the subsystem. It was a purpose-built component associated with aiming, sighting, and operating the XM28 system. That makes it especially desirable because it connects directly to how the Cobra’s chin turret was actually employed in combat service.
What This Piece Is
This listing is for an original 7.62mm M134 / 40mm XM129 sighting station for the XM28 Armament Sub-System on the AH-1G Attack Helicopter.
In practical terms, this piece is especially relevant for:
Because this is a specialized Cobra subsystem component, it has strong value both as a stand-alone display artifact and as a restoration or exhibit piece.
Historical Significance
The AH-1G Cobra changed the direction of Army aviation by introducing a purpose-built attack helicopter optimized for combat in Southeast Asia. Its narrow fuselage, tandem seating, and chin-turret weapon system made it one of the most recognizable helicopters of the war. The XM28 armament installation, especially in M134 / XM129 configuration, represents one of the classic early Cobra weapon fits.
That makes this sighting station historically important because it is tied not just to the aircraft itself, but to the actual weapon-control side of the Cobra’s combat role. Instead of being a generic structural or airframe item, it is part of the system that helped make the AH-1G such an effective and feared gunship.
For collectors and historians, this piece is especially relevant to subjects such as:
About This Item
This listing is for an original 7.62mm M134 / 40mm XM129 Sighting Station for the XM28 Armament Sub-System used on the AH-1G Attack Helicopter.
As noted, this item is very rare, and we only have a few left.
It is especially well suited for:
Because original Cobra armament-system parts have become increasingly difficult to find, surviving pieces like this are highly desirable to serious collectors and institutions.
Why This Piece Matters
Many Vietnam-era helicopter parts are interesting, but few are as visually and historically compelling as original components tied directly to the Cobra’s weapon system. This sighting station is part of what made the XM28 more than just a collection of weapons bolted to the nose. It represents the gunner’s side of the fire-control and sighting system that helped turn the AH-1G into one of the defining attack helicopters of the war.
For collectors, it is a rare original Cobra subsystem component with strong display value. For restorers, it is the kind of hard-to-find piece that can materially improve the authenticity of a project. For museums, it helps tell the story of how the early Cobra’s chin turret was actually operated and employed.
Pictures are stock images of our inventory. Unless otherwise noted, you will not be receiving the exact item shown in the pictures. The pictures are representative of the item's general condition. The item you receive might be slightly better, or worse, condition than was shown in the pictures.
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