M4 Cant Corrector for the M1 / M1A1 Gunners Quadrant on the 105mm M102 Howitzer
$375.00
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M4 Cant Corrector for the M1 / M1A1 Gunners Quadrant
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Complete your M102 fire-control kit with an original New Old Stock M4 Cant Corrector for use with the M1 / M1A1 Gunner’s Quadrant. This is the kind of small, often-missing accessory that separates a basic artillery display from a truly correct one. Still in its original military packaging, this M4 Cant Corrector offers the originality, preservation, and historical character that serious collectors and restorers look for in authentic U.S. field artillery equipment.
As the name suggests, the cant corrector was part of the gun-laying and leveling process, supporting accurate elevation work by addressing cant / cross-level error when using the gunner’s quadrant. On artillery pieces like the 105mm M102 howitzer, proper leveling and quadrant use were critical to accurate indirect fire, which is exactly why original support accessories like this were part of the broader sighting and laying equipment set.
The M102, the Gunner’s Quadrant, and Correct Laying
The 105mm M102 howitzer entered U.S. Army service in the mid-1960s and became one of the signature light artillery pieces of the Vietnam era. Lighter and far more mobile than the older M101-series 105mm howitzers, the M102 was designed for airborne, airmobile, and light infantry use. Its low profile, 360-degree traverse, and helicopter transportability made it especially valuable in Vietnam and later U.S. service.
The M102 relied on precise laying instruments to do its job correctly. U.S. manuals identify the M1A1 Gunner’s Quadrant as part of the M102’s equipment, and note that the howitzer required a serviceable quadrant to remain mission capable. The gunner’s quadrant itself is a portable precision leveling instrument used for laying guns and howitzers in elevation, measuring elevation or depression angles, and checking the adjustment of elevation devices. In other words, it was one of the key precision tools in the artillery section’s kit.
That is what makes accessories like the M4 Cant Corrector so desirable today. Even though it is a small component, it belongs to the same precision-laying world as the quadrant itself and reflects the attention U.S. artillery crews had to pay to cant, cross-level, and exact gun alignment to put rounds where they belonged.
About This M4 Cant Corrector
This item is offered as new old stock, meaning it was manufactured for military service use but remained unissued. It is still in its original packaging, which is a major plus for collectors who value untouched surplus condition.
Key features of this example:
- Original U.S. military component, not a reproduction
- Correctly identified as an M4 Cant Corrector for the M1 / M1A1 Gunner’s Quadrant on the 105mm M102 howitzer
- Still in original packaging
- Ideal for M102 tool kits, artillery instrument displays, or restoration projects
- A scarce supporting accessory that is often missing from surviving quadrant sets and fire-control collections
FSN: 1290-065-5327
P/N: 8626159
Because it has been stored for decades, the packaging will vary in condition. Some examples may show shelf wear, staining, tears, brittleness, or general aging to the outer wrap, but that storage wear is part of what confirms the item’s originality and long-term military preservation.
Why This Piece Matters
Collectors often focus on the big-ticket items: the quadrant, the sight mount, the panoramic telescope, or the howitzer itself. But anyone who has restored artillery instruments knows the hardest pieces to replace are often the small support accessories that got separated, damaged, or discarded over time.
That is exactly where this M4 Cant Corrector fits. It is the kind of original supporting component that helps:
- Complete an M102 sighting / laying kit
- improve the accuracy of a museum or educational display
- add originality to an M1 / M1A1 gunner’s quadrant setup
- preserve the finer details of U.S. field artillery fire-control history
For the advanced collector, this is not just a spare part. It is an original, packed piece of U.S. artillery instrument history.
Ideal For
This M4 Cant Corrector is an excellent fit for:
- 105mm M102 howitzer restorations
- M1 / M1A1 gunner’s quadrant displays
- museum and educational collections focused on Vietnam-era U.S. artillery
- collectors of original U.S. fire-control and aiming equipment
- artillery tool kits where originality matters down to the smallest component
Approx length 7", Approx width 2", Approx height 2", Approx weight 1.6lbs.
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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