Navy arms SXS lock

[Albanyco]

Anybody know where I can find instructions on how to disassemble the lock? Just purchased this gun and the right barrel has a hair trigger.

 

[Lorne Johnson]

Navy Arms has sold SxS made by Pietta and by Pedersoli. Current Pedersolis hold the locks in place with a screw at the front of each lock and a through bolt toward the back (it's pretty obvious)and all three are slotted for standard screw driver blades.Once you get the lock off there are a number of possible causes for the hair trigger. Overly polished sear--that will show up dry firing with the lock off the gun. Wood preventing the sear or the trigger from retracting sufficently when cocked. (Had this on one that I bought used). Also had a kit that some one had assembled in an eccentric fashion--had to file down the trigger on the underside (not where it engaged the sear, which is hardened).

To take apart the lock you really want to use a main-spring vise. You cock the lock, place the vise and adjust the vise so that it gently holds the coked mainspring in place. Then uncock the lock and the vise holds the mainspring cocked and the lock is not under tension, except for the sear spring, and you can handle that.

Good luck. Richard Beauchamp at flintlocksetc.com is my source for Pedersoli parts.

 

[Albanyco]

Mine was made by pietta, is the lock similar to the pedersoli?

 

[bigted]

as far as the function and tear down they are all the same [with the exception of the coil spring offerings of modern rifles n such].

the mainspring vise advise is sound and will de-tension the lock for disassembly and all are very straight forward.

i also would look at how the lock functions out of the weapon and if it does fine then you will know that it has to do with the wood to metal fit inside the mortise regarding the lock function.

 

[lowcsp]

chambers recommends you leave the lock uncocked and tighten the vice just enough to remove mainspring then loosen the vice. I used to put the lock at half cock and then put vice on but after three springs broke I took their advice.

 

[Albanyco]

So after taking the lock off the right side I've discovered my right hand lock bridle broken in half. :cursing:

I've looked up all the usual suspects for parts with no luck. Any suggestions?

 

[RP3543]

So after taking the lock off the right side I've discovered my right hand lock bridle broken in half. :cursing:

I've looked up all the usual suspects for parts with no luck. Any suggestions?

Not many Pietta parts available these days...I would find a machinist and have him copy the part. A jeweler or a musical instrument repairman may be able to silver-braze it back together for you.
Good luck.

 

[Albanyco]

I was afraid of that.

 

[Albanyco]

Just an update, brought the part to a jeweler. They are going to try and solder it. I'll let you guys know if it works, a few other people have had this issue as well.

 

[swathdiver]

Flintlocks etc. still has lock parts available for the Pietta SxS. Still looking for a tang (standing breech) for mine... :idunno:

 

[Albanyco]

Thank you very much! I will reach out to them. So as I promised the update. The jeweler was not able to rejoin the broken part. I made a new part after a lot of milling and filing and drilling. After I installed it I found another issue. Somebody attempted a home brew trigger job on it and it is unsafe. Also, the new part I made is a touch too thick and the lock doesn't work right when installed. I am beyond frustrated. It's a beautiful gun, and I would hate for it to be a wallhanger. Going to have a beer and put my thinking cap on.

 

[Lorne Johnson]

Lets hope Richard Beauchamp can come through.

There are gun smiths who can TIG weld the part but but you are talking skilled and equipped.

 

[Albanyco]

The original parts looks like it was cast out of manure metal. I doubt it is weldable. It really irks me because the rest of the gun is very nicely made.

 

[Lorne Johnson]

Are the tumbler and sear junk metal too?

 

[Albanyco]

Tumbler and sear appear to be steel. The sear has a bunch of filing marks on it so I'm guessing somebody tried to do a trigger job on it and screwed it up.

 

[nkbj]

Does your hammers have the screw heads with the extremely narrow slots?

 

[Albanyco]

Seems pretty narrow to me!

 

[Lorne Johnson]

You may well be able to polish the sear, or refile it to the proper angle.

But, until you have the bridle resolved, I wouldn't mess with it.

The owner of TOTW recommended a metal worker in New Hampshire to me that would be a very good shot to help you with this. I think his first name was Ed, and I don't have his name any more. Calling TOTW would be worth a shot. (Especially if Beauchamp doesn't have the part.)

Could also look for a beater Pietta with a decent lock. Stranger things have happened.

 

[swathdiver]

Yeah, and if you find that beater for your lock parts, I'd be more than happy to buy the tang off you!

 

[Albanyco]

Richard has parts! You guys saved the day!