The Killer Innovations Sig P320C V1 Slide will not work with the P320 XCompact 3.6" model.
Hello! Thank you for asking, yes it will work with the M18! - Z
Yes, it is compatible with the FLux Raider as long as it is used in conjunction with a compensator.
Yes, this slide is compatible with the California compliant M18.
Our slides are designed for a 9mm barrel. You cannot use a .357 barrel with this slide.
Yes, the Killer Innovations Sig P320C V1 Slide is dual cut for optics with the DPP or RMR pattern footprint. The Romeo X-Pro uses the DPP footprint and will mount directly to the slide without the need for an adapter plate.
The Burris Fast Fire 3 Has a Docter/Noblex footprint. Our Sig P320 C slides are cut for either a Trijicon RMR or Leupold Delta Point Pro footprint.
If the frame is a Sig P320 Compact, P320 AXG Scorpion, P320 M18, or P320 RXP Compact the Killer Innovations Sig P320C V1 Slide should work fine.
The Killer Innovations Sig P320C V1 Slide weighs 8.2oz (stripped slide with cover plate and screws).
The Killer Innovations Sig P320C V1 Slide will most likely not work with a MKC conversion kit. However, I recommend contacting the manufacturer of the MCK you are using to confirm.