Harpers Ferry Model 1816 Musket: Unique .69 Caliber Civil War Conversion

The Harpers Ferry Model 1816 is a landmark in American arms development — a long, reliable smoothbore musket that served through multiple conflicts and evolutions. As tactical shooters and collectors, we value pieces that tell a story of innovation, adaptation, and the craftsmen who modified service arms under pressure.

HARPERS FERRY RARE BUTTERFIELD CONVERSION OF 1816 HARPERS FERRY MUSKET

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Historical significance and conversion details

This example is one of roughly 200 Harpers Ferry Model 1816 muskets altered by Jesse S. Butterfield following the outbreak of the Civil War. The original musket was manufactured in 1836 and later converted in 1861 to incorporate the pellet primer system. Barrel marking reads “Butterfields/PHILADA” and the lock plate is stamped “Butterfield’s/Patent Dec. 11, 1855/Philada.” The rear of the hammer still bears “Harpers/Ferry/1836”, tying the conversion back to its original arsenal roots.

Technical highlights and field-readiness

The musket is a .69 caliber, 42″ round smooth bore — a size and bore type consistent with period infantry muskets. The .69 caliber delivers substantial external ballistics at musket ranges and is historically accurate for engagement scenarios of the era. Metal components present a smooth grey patina with pin-prick oxidation; the wood stock is largely intact with raised grain, small nicks, and dings consistent with service use and age.

Collectability, pricing, and provenance

As a Single Shot category rarity with documented Butterfield alteration, this firearm occupies a unique place for both museum-grade collections and advanced historical shooters. The listed price is $8,500.99 — reflecting scarcity, conversion history, and condition. View product details and pricing via View product details.

Why this piece matters to collectors and historians

Beyond its mechanical aspects, this musket documents mid-19th century adaptation — an arsenal weapon modified by a named gunsmith to meet evolving battlefield requirements. That combination of original Harpers Ferry manufacture (1836), the 1861 Butterfield conversion, and identifiable markings make it a standout acquisition for serious collections. Check current availability and purchase options at Check availability.

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