Author Topic: Building a true parts gun  (Read 4806 times)

Offline rich pierce

  • Administrator
  • Hero Member
  • *
  • Posts: 21022
Re: Building a true parts gun
« Reply #50 on: October 24, 2025, 03:49:02 AM »
I’ve been working on another original flintlock which is likely a 1763 French musket lock. This original lock lacks all springs, a cock, a pan, and a frizzen. I bought a pan, frizzen spring, mainspring, and frizzen for a 1763. I had a French cock that will look more than good even if not appropriate. Again, the concept is I’m building composite gun(s) which involves restoring old parts to working condition then building a gun with original parts.

Tonight I fit the cock to the tumbler, which requires checking the indexing of the cock to the tumbler. With the cock shoulder at rest, the tumbler toe must be very close to the bottom of the plate, as is normal with the cock at rest. The cock must seat against the shoulder where the square section of the tumbler axle meets the round axle. Check! 20 minutes of filing.

Next I fit the pan to the lock plate. I really lucked out here. Like it was made for it. Thank you TRS! (and my secret consultant)! 20 minutes of filing.

Next I fit the frizzen toe between the plate and pan bridle. Here are the challenges: the pan lid of the frizzen must align with the inside edge of the bolster. The frizzen toe must be a close fit in the slot formed by the lock plate and pan frizzen bridle. The pan lid on the frizzen has to sit down nicely on the pan itself. Mostly there.









Andover, Vermont

Offline Steeltrap

  • Full Member
  • ***
  • Posts: 188
Re: Building a true parts gun
« Reply #51 on: October 24, 2025, 03:23:20 PM »
I've read a lot on lock geometry including this post from Jim Chambers: 

From what I've read, Chambers stated "The line of the lower jaw should intersect the pan just forward of the pan center.". This angle is to get the maximum "scrap" of the flint from top to bottom of the frizzen.  See the purple line in the photo below


Offline rich pierce

  • Administrator
  • Hero Member
  • *
  • Posts: 21022
Re: Building a true parts gun
« Reply #52 on: October 24, 2025, 04:28:17 PM »
If necessary I can bend the neck on this one.

Andover, Vermont