I called Hi-Point today. I wanted to findout what I needed to do to get my CF380 and C9 upgraded to hold open the last round. I am always so pleased with the serive at Hi-Point. All I have to do is ship them along with may magazines to HP and they will take care of all the upgrades I might need or want. Also, when shipping to HP, I was told to inform UPS that I was shipping "machined parts". This way I would avoid any problems associated with sending gun parts. I'm looking forward to the new upgrades.