It's been almost a year since I purchased my KS7, it has been reliable and durable after 800 rounds of buck, bird and slugs with only a handful of FTF. The malfunctions are 100% caused by user error, I've noticed that I short stroke the KS7 only when "rapid firing"
I've been fortunate to have an error free(almost) shotgun out the box from Kel-Tec, plenty of negative online reviews about this company and firearm.
I primarily use my KS7 for protection while on camping trips, I recently added a flashlight to quickly identify any lurkers near the campsite during the night hours.
Welcome to the forum from a fellow ks7 owner with a similar experience as yours. Also from CA and that photo looks like Lytle Creek Firing Lane?
Good looking setup! You found the best kel tec forum online!