Help making a new spring

[Catfish]

So I got this antique Ethan Allen boot gun and the original springs are AWOL. I'll need to manufacture a new flat spring for the main and probably adapt a short coil spring for the trigger. I need advice from our gunsmiths on how to go about this. what type of steel should I get, how thick should I make it, and how do I properly temper it so it'll behave as a spring? I cut a piece of zip-tie to stand in for it in these photos:

 

[Sharps40]

Buy annealed spring steel from brownells or adapt an saa hammer spring.

Looks like a spur broke off the trigger.

 

[lowspeed]

As said above. Brownells sells flat spring stock. When you cut and fit the spring, be careful to polish the scratches and file marks out or when you harden it, it will break at those points. Read the instructions about heat treating the stock and plan on making a few errors.

 

[cold1]

If you have never studied flat springs, buy extra because you're going to break a few trying to get it right.

Your cable tie is too short or too long, the screw will interfere with the spring in that configuration.

The spring will probably need to be tapered either in width or thickness. Hardening the spring isn't too difficult. Red hot and drop it in oil. Tempering is where the magic happens. You will be shooting for a blue color. Gently heat the hardened spring evenly. Watch for the surface colors start to change. Google steel color chart for a full description of the colors you will see. Once you get to blue, drop in water to stop any further color change.

 

[Catfish]

the screw will interfere with the spring in that configuration

Yes its a little short, but this one is weird. It has a flat which I assume is to support the spring since there’s no screw to secure it in place.

 

[Hellquest]

Done a many with spring flats from different outfits. Brownells being the most used. Tons of information online how to do it. Worked one a lot of older guns so I bought bunch at one time. Four or five jobs paid for everything. Screw making is the pain to do.