Luger Cocking issue

[Bladepoint]

I just picked up a mismatch Luger that doesn't want to #### reliably. When I charge it with the safety on, or act all gentle with it, it cocks just fine. But, if I let it slam home with the safety off, it doesn't ####/decocks itself if was cocked already.

At this point i'm concerned that the sear is either slipping, or bouncing off the firing pin, and it'll run away if I try and shoot it.

Anybody have an idea what's going on?

I'm linking some photos of the striker and sear bar:

 

[smellie]

Striker and sear bar are supposed to be a perfect match.... which gives you a perfect trigger.

Of course, they also MUST be CLEAN. Those parts look as if there is heavy grease or something in there. That will mess things up, especially if the tiny PLUNGER in the sear bar is greased solid.

I would think a thorough cleaning, followed by VERY light lubrication, could solve your problem.

Do have fun: there are few firearms as inherently accurate as a good Luger!

 

[Bladepoint]

Thanks for the reply!

I cleaned the sear bar and striker, first with gun cleaner, then with isopropyl alcohol. There was no visual change to the parts, but they felt clean and dry. Unfortunately, I still have the same issue.

The trigger pull is very light. With the grip safety tied down, the weight of the pistol is just enough to trigger it.

 

[smellie]

Did you check the tiny PLUNGER in the sear bar? That is your actual fire control! Is it free to move? Is its little SPRING strong enough?

The only other thing I can think of which would give the result you are describing would be the ENGAGEMENT between the Sear and the Striker. There should be a VERY slight positive engagement between these parts, generally less than 1 degree. The only way to adjust this is with a fine STONE, a lot of light and a good magnifying glass.

Personally, I would not do this job myself on any of my own Lugers.... and I only know ONE gunsmith who I would trust to do the job correctly.

A Luger trigger, properly adjusted, should exhibit a definite 2-stage let-off (very like on a Lee-Enfield) but there should be NO creep in the second stage.

Hopefully, someone can come up with something; many gunsmiths simply will not work on Lugers..... and they are SO accurate when in good trim!

 

[SIGP2101]

Needs hand fitting, geometry is wrong. Also the plunger needs to be in perfect working order.

 

[Bladepoint]

The plunger in the sear bar moves in and out freely, with no resistance outside of the spring pressure.

Mine absolutely does NOT have a 2-stage trigger, it just gradually comes back until it releases the striker.

So, sear engagement is most likely the issue, and needs to be fitted. Any recommendations on where to look to find someone to get it fixed? I normally like to do my own work, but hand-fitting anything that isn't furniture is a bit outside my comfort zone.

 

[smellie]

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