The Clock 30 is the sub-compact 45 ACP. I am not a Clock hater, but I just do not do well shooting Glocks and it’s not something that I look forward to take to the range. Glocks are incredibly reliable, and you will definitely hit body mass. Easy maintenance, and my opinion is definitely in the minority. Most of the people that I know love Glocks. I am thinking about sending one to Wilson Combat for some customization and maybe I will be more effective and enjoy shooting them. I don’t like the 30 for home protection because of the 10 round magazine capacity and, for concealed carry, I like something smaller. I fired 20 rounds rapid fire at 30 feet and, like most Glocks, I tend to shoot left. Three ejections out of 20 rounds hit me in the middle of my forehead. I posted You Tube videos on the GEN 4 models and I am sure that improvements have been made over my five or six year old model.