Unknown - Flintlock Mechanism

A flintlock firearm is a type of firearm that uses a flint striking against steel to ignite gunpowder, marking a significant advancement in firearms technology.
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smithy
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Unknown - Flintlock Mechanism

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JCastaway-unknown-small-flintlock-mechanism-1.jpg
JCastaway-unknown-small-flintlock-mechanism-1.jpg (280.55 KiB) Viewed 19771 times

This item was simply labeled "found metal detecting in Canada," and it’s a fascinating yet puzzling little object. In its current state, the mechanism is entirely stuck, and although it appears to be fully functional, there are hints that it might never have produced a spark.

JCastaway-unknown-small-flintlock-mechanism-2.jpg
JCastaway-unknown-small-flintlock-mechanism-2.jpg (221.65 KiB) Viewed 19771 times
  • The mechanism appears to be a classic flintlock, likely from a historical firearm, such as a musket or pistol, given its design and components.
  • It shows significant rust and corrosion, indicating it has been exposed to moisture and possibly buried or left in outdoor conditions for an extended period, consistent with being found metal detecting in Canada.
  • The flintlock’s main components, including the hammer (cock) and frizzen, are visible, but the hammer seems to be in a fixed or seized position, suggesting the mechanism is jammed or rusted shut.
  • There are screws and pivot points visible, but they appear worn or corroded, which prevent the mechanism from moving or functioning properly.
  • The metal has a dark, oxidized patina, typical of aged iron or steel that has not been maintained or preserved.
  • There are no obvious signs of wear or use on the striking surfaces (e.g., the frizzen or hammer), which might suggest that the mechanism was never fired or used, aligning with the note that it may never have generated a spark.
  • The design features a serpentine-shaped hammer and a pan cover, characteristic of flintlock technology used primarily from the 17th to early 19th centuries.
  • The frizzen spring is a coiled compression spring and the mount appears to be a later addition welded to the lock plate. Coiled springs began appearing in other mechanical devices (e.g., clocks and locks) in the 15th century, but their use in firearms, particularly flintlocks, was rare or nonexistent during this period.
  • The object has holes for mounting or attachment to a firearm stock, indicating it was part of a larger weapon.
  • There are no visible maker’s marks, serial numbers, or inscriptions, which could make identifying its exact origin or age challenging without further analysis.
  • The main spring seems rather beefy for this size lock mechanism and will require additional inspection once removed
  • The flint clamping mechanism appears too tiny to effectively secure a flint for practical use, raising doubts about whether this weapon was ever fired in the past.
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smithy
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Re: Unknown - Flintlock Mechanism

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JCastaway-unknown-small-flintlock-mechanism-3.jpg
JCastaway-unknown-small-flintlock-mechanism-3.jpg (570.51 KiB) Viewed 19764 times

The initial challenge was disassembling the mechanism, as all components were stuck together, and forcing them apart risked damaging parts and creating more work. Using a mix of chemicals, heat, and careful patience, we successfully took it apart and sent the pieces for a brief tumble. The parts are now prepared for reassembly.

JCastaway-unknown-small-flintlock-mechanism-4.jpg
JCastaway-unknown-small-flintlock-mechanism-4.jpg (1.04 MiB) Viewed 19763 times

With the parts now unlocked, we can manipulate the frizzen again, but as expected, the main spring is overly stiff, the sear spring isn’t original, and the sear fails to align properly with the bridle to engage the frizzen. These images also provide a good view into the suspected late sear spring mount addition that appears to be welded on.

JCastaway-unknown-small-flintlock-mechanism-6.jpg
JCastaway-unknown-small-flintlock-mechanism-6.jpg (431.69 KiB) Viewed 19763 times

We tidied up and honed the edges of the bridle and sear, which improved their interaction, but while the sear now connects with the bridle, it lacks the strength to stay engaged. I can make it hold by applying upward pressure to mimic extra spring tension, yet this increases the trigger pull force to an impractical level. The surfaces are now satisfactory, but the mainspring remains excessively powerful.

JCastaway-unknown-small-flintlock-mechanism-5.jpg
JCastaway-unknown-small-flintlock-mechanism-5.jpg (1.06 MiB) Viewed 19763 times

I’m not thrilled about resorting to this, but we ground down the spring, shaving off some material to significantly thin it out. The outcome was a success, as the lock mechanism can now engage correctly, likely for the first time in ages.
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Re: Unknown - Flintlock Mechanism

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Our suspicion has been verified. By sheer chance, I was perusing auction listings and stumbled upon a pistol listed as a "Decorative Flint Lock Pistol W/Axe End." This suggests it’s an antique but inoperative piece. The numerous resemblances to what we were looking for gave us clarity on our next step. Given that the lock was intentionally crafted to be non-working, the logical course of action is to explore whether we can restore its functionality and build a gun for it. :D

Here is the auction example:
JCastaway-decorative-lock-example.jpg
JCastaway-decorative-lock-example.jpg (128 KiB) Viewed 19751 times

Now that we know this mechanism was only for reproduction use I doubt the frizzen was hardened. The best thing we can do is re-harden and see if we can get it to work. Into the forge and oil dip!

JCastaway-frizzen-forge-harden.jpg
JCastaway-frizzen-forge-harden.jpg (344.52 KiB) Viewed 18300 times
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