I just purchased a 930 Tactical 5 shot. I was wondering if any of you guys know if I can install an extended magazine tube on this model? I looked on the Mossberg web sight and didn't see any. I did see the ghost ring sights I want to put on this shotgun. I wanted to get the 930 SPX but they didn't have one in stock, and the gun store guy said he didn't know how long it would take for him to get one in if he ordered one. If I can get the sights and extended mag. it would be close to an SPX I think.