I'm looking to add a +2 or +3 mag extension to a Mossberg 930 (not SPX) I recently purchased. From my research it appears that Choate provides a good product. However, I cannot find anything specific for the 930. I did read that someone contacted Mossberg and they were told that models made for the 5500/9200 would work just fine for the 930. Is this true? Here's what I'm currently looking at. Will this work for the 930? Any tips, tricks or words of advice on springs, followers, other extensions, etc? http://www.brownells.com/.aspx/sid=...a_Blue_Mag_Ext__3_Rds_fit_Moss__5500_9200_935 Sorry if this specific make/model has been discussed previously. I couldn't find anything on it. Thanks!!