Lower Parts Kit (LPK) for SIG Sauer P320 9mm, .40 S&W, and 357 SIG Fire Control Unit (FCU) Parts Kit Description This premium lower parts kit for the SIG Sauer P320 fire control unit (FCU) includes everything needed to complete one's SIG Sauer or MUP 1 build. All of the components in the set are equal or better than the OEM versions. This is a best-of-breed build solution featuring parts made from polymer, billet steel, or high-quality stamped steel versus MIM (Metal Injection Molding). It elevates the quality of the fire control unit components to an unparalleled level. All of the parts shown are included except the actual FCU, which is a regulated component. The parts displayed in the official SIG SAUER factory parts diagram directly below this paragraph, each with the factory number circled in orange beside it, are part of this kit. Don't settle for less in your build. Choose a solution that will provide you with the highest performance, unmatched durability, and unsurpassed reliability. Notes The buyer will receive a completion kit identical to the one seen in the photos below. Feel free to message through the ebay mailing system for answers to any questions. Above images: Photos of a completion kit identical to one the winning bidder will receive. All photos and text Copyright © 2024 by Phil Steinschneider and Cool F/X™