Hey. I'm new to this forum, but I've been shooting walthers for about 12 years. Love em. I recently got a threaded barrel from Jarvis and added a compensator, but now the spring is too heavy and stovepipes on me. I did a quick search of the web and couldn't find anyone making lighter springs for the PPQ M1 9mm specifically, so I thought I'd ask y'all if you know of someone makings these or something that will work just as well. Thanks!