FCU 320 FRAME 9/40/357 BLACK 8900161 | FIRE CONTROL UNIT Manufacturer Model Number: 8900161 Manufacturer: SIG SAUER Model: P320 Fire Control Unit Caliber: No Caliber Listed Type: Fire Control Unit Item Type: Firearm Finish: Black Shipping Weight: 0.7 Feature: P320 Frame - 9/40/357 Feature: Skeletonized Flat Blade Feature: Custom Works Optic Adjustable Objective: false Optic Reticle Illuminated: false