Yep. Guarder spring kinda busted the gearbox shell. Not like it was terrific in the first place. Any suggestions on a replacement shell? I'd prefer something that uses a VFC or KWA tab allignment style spring guide instead of the small pin one that the A&K uses. Retro Arms is expensive, but seems to tick most of the boxes, but I don't know if it's compatible with the A&K SR-25K body.