Need some help. I have one of those cute little Crescent 410 sideXside shotguns that needs a mainspring for the right [R] side lock. These are the ones that are true sidelock guns. Looking at the Left side lock it appears [?] the spring is the same but who knows. Lord knows not me. ANY help will be greatly appreciated by me and my daughter.
Aloha, Mark
kailuacustom@msn.com

Gunparts corp jack frist gunparts would be the places I would start looking

If you're unable to find an exact replacement you may want to look at Brownell's Shotgun Mainspring Kit. It's an assortment of different size/style leaf springs. Probably requires fitting/grinding for a particular gun.
I used a spring from their Top Lever Kit years ago to repair a Bayard shotgun. Took patience but got it done from one of the basic springs provided,
Good luck.

Bohica, I worked on a Crescent 20 ga. several years ago that came into my shop as a baskeet case. Many small parts had been lost, including the mainsprings. I used the Brownell's springs. They do require fitting, which any competent gunsmith can do. The alternative is to simply make new ones (Brownells Kinks book has several articles on how-to), also many videos online regarding spring making.

Mark, If you can send a picture and some dimensions, I have an assortment of used ones, but no idea what they fit.
Duane
dgr@duanesguns.com