Next Level Armament NLA Sig Saure MPX/MCX 9mm Luger Barrel Adapter Black. We created the NLA Sig Barrel Adapter to complement our Sig 9mm Flash Hiders and Comps. Ensure a tight fit of your muzzle device with the adapter. Sig Sauer added a tapered end to their MPX and MCX barrels. This prevents the crush washer from seating correctly when installing a standard muzzle device. The taper can also prevent proper installation of a suppressor which could create damage to your suppressor or a baffle strike. The NLA Sig Barrel Adapter fits on the end of the barrel (inner tapered end faces the barrel) providing a flat surface for the crush washer to properly function. This eliminates the need for indexing and/or applying a thread lock product to hold the muzzle device in place. NOTE: We include the adapter with our 9mm muzzle devices threaded for Sig barrels. Specifications for Next Level Armament NLA Sig Saure MPX/MCX 9mm Luger Barrel Adapter: Manufacturer: Next Level Armament Color: Black Finish: Nitride Fabric/Material: 4140 Steel Gun Make: SIG Sauer Gun Model: SIG Sauer MCX SIG Sauer MPX Weight: 0.1 lb Caliber: 9mm Luger Features of Next Level Armament Barrel Adapter Sig MPX/MCX tapered barrel adapter for MPX/MCX Package Contents: Next Level Armament NLA Sig Saure MPX/MCX 9mm Luger Barrel Adapter What firearm models does the manufacturer say Next Level Armament NLA Sig Saure MPX/MCX 9mm Luger Barrel Adapter is compatible with? The manufacturer suggests that Next Level Armament NLA Sig Saure MPX/MCX 9mm Luger Barrel Adapter is compatible with SIG Sauer MPX SIG Sauer MCXNext Level Armament NLX659: NLA Sig Saure MPX/MCX 9mm Luger Barrel Adapter Black