All barrels and parts in this collection are manufactured by ILWT LLC, to fit the MPX type firearm. Due to increase in blank prices we have to raise the prices of our assemblies as of January 2, 2018. DISCLAIMER: “MPX” is a federally registered trademark of SIG SAUER, Inc. and is one of many trademarks owned by SIG SAUER, Inc. Neither ILWT, LLC nor this website are affiliated in any manner with, or otherwise endorsed by, SIG SAUER, Inc. The use of “MPX” on this page is merely to advertise the sale of MPX type barrels, parts, or components, manufactured by ILWT LLC.