And they are of course out of stock. This is getting ridiculous. Does Brownells have anything that is actually IN stock? We need to find an alternative - a rectangular spring that’s about 18x45mm of the proper strength and length or longer but intended for an application other than a rifle magazine.
The flat parts can be made from aluminum, and the follower I can make from a mix of JB Steelweld and a little bit of dry graphite, makes it nice and slippery. The spring is a no brainer unless a no brainer tries to duplicate it then you create a black hole.