I wrote to Wolff about making aftermarket springs for Steyrs. This was the response I got: Thank you for writing and for your interest in our product line. While we do not have plans on making replacement springs for the the Steyr M40 at this time, that can change as demand increases. About all I can offer is to run a database search for a similar spring. I'll need the OD, wire size or spring ID, the number of coils and the overall length of the existing M40 spring you're looking to replace. Sorry we can't be of more assistance to you at this time. Regards, John Andrews Wolff Gunsprings Well, if enough people ask them, they will do it. Their e-mail address is: email@example.com In addition, I will include a poll here so that perhaps I can use it to show them that indeed there is an interest. I may also include this same thread and poll at Glocktalk in the Steyr forum, so vote there too. Your comments would probably also be useful.