Fire Control Unit

Sig Sauer

Sig Sauer P320 Custom Works Fire Control Unit (FCU) — Gold Nitride Finish, Fits 9mm Luger / 40 S&W / 357 Sig Models

Sig Sauer

Sig Sauer P320 Custom Works Fire Control Unit 8900161 - Black Nitride Finish for 9mm Luger, 40 S&W, and 357 Sig