# 1, I'm really glad to be a new member. I have a Mossberg 510 that I want to do some improvements on. Please forgive any wrong words that I use because I'm pretty new to this hobby. I'm trying to find out if anyone manufactures a mag extension for my 510, also I understand that I have to have another barrel for the gun. Why, and where can I find these items. I appreciate any help that I can receive on this question. Thanks very much