Atrius Development Group X-SERIES Ambidextrous Forced Reset Selector, Drop-In Install, Works With MCX, SPEAR LT/RATTLER LT & MPX, Made In The USA - ADG-FRS-AMBI-X

This is the Atrius Ambidextrous X-SERIES Forced Reset Selector. It's the latest addition to the FRS family which features a new trip system that has a slip base and slip clutch to allow for a universal fitment amongst gas piston platforms. The X-Series FRS is powered by Atrius Development Group's Forced Reset Technology™. It's the most robust solution on the market that allows users to have 3 positions for Sig Sauer MCX Spear LT®  and MPX®   models: SAFE, Traditional SEMI-AUTOMATIC, and SUPER SEMI. PRODUCT SPECIFICATIONS The Atrius Development Group FRS X-Series was designed to be compatible with a variety of Sig Sauer MCX®, MPX®, Rattler® platforms, and even Sig's MCX-Spear LT Upper AR Conversion Kit. Features Style: Atrius Ambi Selector Switch (original design) Configuration: Safe, Semi, Super-Semi Includes a new FRS lever with dimension compatible for MCX/MPX product lines Universal design for Sig Sauer® gas piston platforms Installation: Drop-In Ready (No Modifications Necessary) Manufactured in the USA Materials Corrosion Resistant Black Nitride Finish Made of Heat Treated 4140 Steel Compatibility Platform Compatibility: MCX®, MCX-Spear LT®, MCX-Rattler LT®, MCX-Spear LT Upper AR Conversion Kit®, MPX PCC®, MPX-K®. Compatible with all generations (safety latch may need to be removed in early gens). Trigger Compatibility: Mil-Spec Triggers that come with MCX/MPX platforms.Single stage mil-spec triggers that do not have a u-notch or relief cut. Not Compatible Some MPX's come with drop-in cassette style triggers that are not compatible with the FRS. Geissele triggers designed for the MCX/MPX and the Atrius G-LEVER are not compatible. MCX: The Two Stage Match Duo AR trigger from Sig is not compatible. MCX: Some MCX's come with a skeletonized AR trigger from the factory. This trigger is not compatible due to the U-notch/relief cut on the rear of its trigger bar. MPX Copperhead not compatible