I kind of just went through the same thing. I have a law tactical folder on my JR which adds some length, and ended up picking up an armaspec stealth recoil spring. I 'm thinking I can machine/add weights that equal the length the folder added, and hope the SRS makes a difference? It was 100 bucks, and I figure between a hydraulic buffer, longer buffer tube, and new spring I'd be in it for four times that much. We shall see I guess.