Did the Mark II trigger job......

[Glennster]

Thanks to some good advice (mostly from JackOfAllTradesMasterAtNone) from you guys, we went back into the Mark II. Here's what we did:
1, polished Transfer bar
2, polished inside of frame
3, polished sear, hammer and all friction points (after stoning)
4, cut about 1 1/2 coils out of the main spring
5, set up a jig, SLIGHTLY stoned hammer & sear
It feels lighter, more crisp/short and it's better for sure....

We were at 3 3/4 pounds, I need to go to the range to get the new trigger weight. I'll post it soooon.....

QUESTION: How does a lighter main spring weight help the trigger pull? I can't figure out how that works.

THANKS for the good advice!!!!!!!!!!!!!!

 

[JackOfAllTradesMasterAtNone]

The main spring pushes on the hammer strut which pushes on the hammer when the sear is engaged with the hammer notch.

Take the upper off and push down on the hammer until the sear engages the notch, then pull up and forward on the hammer with your finger. While pulling up on the hammer -Now pull the trigger. It'll release. Do it again, but put a lot of force on the hammer pulling up/forward while the sear is engaged. It'll release, but it'll take more force on the trigger to do so.

I have no idea where the suggestion to clip coils from the mainspring came from. This shortens the spring and may truly lead to light firing pin strikes. Although the mainspring is not considered a recoil spring, (there is one in the bolt), a short MS may allow hammer bounce and create a slamfire condition. You just did the #1 tabu without asking.

When I suggested one of two lighter main springs that are tried and proven, That's what I meant. Now you can't return the firearm back to stock form if you suddenly have issues with it's operation. And I wouldn't advise selling it someday that way either.

-Steve

 

[Glennster]

When you say slam fire, do you mean double fires, or do you mean that it may fire when the bolt slams forward after I install a new mag?

We put 25 rounds through it after these changes, it has not double fired '' yet ''.

The trigger weight is just under 2 pounds, looks like it's time to go back to a stronger spring.

Again, THANKS for your help!

 

[Drail]

I wouldn't suggest cutting the mainspring back on any .22 pistol. One of the first things I learned when smithing pistols is that a .22 requires a pretty serious strike to fire. Considerably more than most centerfires.

 

[JackOfAllTradesMasterAtNone]

do you mean that it may fire when the bolt slams forward after I install a new mag?

Possible then, but I would suspect it will happen sometime when you least expect it. When you're shooting a string.

-Steve

 

[Glennster]

We tried this for a test. Cocked the gun, put the safety on, pulled the trigger, then removed the safety and bumped the pistol on hard surface. It did not fire.
We have not put too many rounds through it yet, so far all is well.
Again, thanks for the help and the safety warnings!!!

 

[243winxb]

oil on the hammer sear ingagement can make the hammer follow the slide, the gun would double or go full auto. I have never had one that was safe at under 2lbs pull. Be careful.

 

[Glennster]

We will be careful!!!
THANK YOU!!!