S&W 1076

[StockIIBoss]

Interesting stamp on this spur hammer...




Took it apart. Wow, internals are a little rough and will need some TLC. Let the labor, I mean 'fun' begin!




Found this link with a decent set of photos.
www.ronterry.com/arms/sw1076/

[The_Shadow]

Interesting to see the hammer is actually marked correctly for the 1076...

[StockIIBoss]

Interesting to see the hammer is actually marked correctly for the 1076...

Yeah, makes me think this might have been an aftermarket part, unless S&W offered these as an option at one time.

[StockIIBoss]

Finished up a mod to improve the 1076 trigger take up. Check out the video and let me know what you think. "After" begins at :20

[The_Shadow]

Did the pull get any lighter?

What mod did you do to the action to get your results?

[StockIIBoss]

You can't hardly feel the remaining take-up, but the pull for the break is not improved. In the case of mine, it's not a heavy break to begin with, and very clean with little to NO creep. I can actually get all the take-up out of it, but it's a fine line between zero slack and a clean, reliable reset. It's just best to have a little play in there just to make sure. Then again, this is dry firing. When shooting live rounds there will be enough forces and movement that a super short take-up wouldn't be an issue at all. At this point, I'm still playing with the various (ok, two) ideas I have.

The simplest mod, and what the video shows is filling the gap between the rearmost hammer hooks to the rear of the trigger bar. Just remove the grip pin and remove the one-piece grip. You'll see the rearmost hooks on the hammer and the relationship to the back of the trigger bar. Even though it looks easy enough, ensuring it works in various trigger positions is another matter. I started with a nylon block trimmed for space for the mainspring support rod, then started sanding it down to fit. You'll see where the spacer block has to come in at an angle to ride over the spacer and not get jammed by it. With the proper angle and thickness you can actually get the double action pull to have little to no take-up, and in this gun, the same as the single action. Pretty cool. The half-cock (or decocker) position is another matter and can't be tuned independently of the other positions. It is what it is, but no big deal, and my goal is really just to improve the single action take-up.

Next concern is just how 'permanent' do you want this mod to be? For testing I simply glued the nylon block (spacer) in position with Loctite super glue. Holds just fine for testing purposes and allows for easy removal for tweaking. If you want a permanent fix, it needs to be a mechanical part of the trigger bar. I'm thinking of solutions for that, keeping in mind that these parts aren't that readily available in case you're having a bad 'smithing' day. I hope to come up with a way to have an adjustable spacer without folks having to hand-fit the parts. Pipe dreams? You can't modify the hammer because of the installation space, so you're limited to the trigger bar. An adjustable wedge is possible with the available space, but then it becomes a precision smithing job. Anyone who wants to jump in here and exchange ideas would be very kewl.


 

[The_Shadow]

Thanks for the explanation and details!  If there was something that S&W could have done to make these pistols better it would have to be the triggers.  I know they were that of Combat/LE use but the trigger pull and take up could have been made better!

Shooting many different makes and styles I have to retrain myself mentally before hand, for the take up...