Lancer Systems Mpx X-cinch Mag Coupler . The Coupler was designed to match the unique contours of the polymer body and align with the molded ribs ensuring the magazines are aligned and held securely without obscuring the view of the rounds. Specifications for Lancer Magazine Coupler Sig Mpx X-cinch Fits Factory Mags: Type/color: Magazine coupler Size/finish: Sig mpx Material: Polymer Package Contents: Lancer Magazine Coupler Sig Mpx X-cinch Fits Factory Mags The Lancer Magazine Coupler Sig Mpx X-cinch Fits Factory Mags is a quality addition to the Lancer Systems lineup. For more great deals on Weapon Accessories by Lancer Systems please browse our Lancer Weapon Accessories page. What firearm models does the manufacturer say Lancer Magazine Coupler Sig Mpx X-cinch Fits Factory Mags is compatible with? The manufacturer suggests that Lancer Magazine Coupler Sig Mpx X-cinch Fits Factory Mags is compatible with SIG Sauer MPXLancer Magazine Coupler Sig Mpx X-cinch Fits Factory Mags