Can I get a non compliant long gun sent to an FFL and converted to be CA compliant?

Before a non-compliant firearm can come into California you need to use what's called a middle man service. This is where you ship a non California compliant firearm to another FFL located out of state and they make the gun California compliant prior to shipping into California. Below are a few out of state FFL's that provide this service.

1. WTB Guns https://wbtguns.com/california-middle-man-transfers/
2. EBR Works https://www.ebrwebstore.com/middleman-ffl-services/
3. New Frontier Armory https://www.newfrontierarmory.com/product/california-middle-man-service/