{"product_id":"matador-mat-9-triad-bullpup-chassis","title":"Matador MAT-9 | TRIAD Bullpup Chassis","description":"\u003cp dir=\"ltr\"\u003eBring a compact bullpup layout to your Matador Arms MAT-9 with the A3 Industries TRIAD Modular Bullpup Chassis. The TRIAD houses a standard mil-spec AR lower receiver and pairs it with a bufferless upper, giving you the versatility of the AR platform in a bullpup package. This complete kit includes the TRIAD chassis and the installation kit made specifically for the MAT-9, along with a barrel extension and handguard extension.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e \u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan style=\"color: rgb(205, 98, 3);\"\u003eWhy a bullpup?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eA bullpup shortens your firearm's overall length without shortening the barrel, making it far more maneuverable in tight spaces. Moving the bolt and barrel rearward also shifts the center of mass behind your grip, for better balance and control, and the shorter distance between the action and butt plate sends recoil more directly into your shoulder with less muzzle rise.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e \u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan style=\"color: rgb(205, 98, 3);\"\u003eA better bullpup trigger\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eThe TRIAD is designed to avoid the typical \"bullpup trigger\" feel. Instead of a sliding trigger bar, it uses a traditional pivoting front trigger and a bell crank that converts the pull of the front trigger into a push on the rear trigger. The result is a natural-feeling trigger with a short, rigid rear linkage that weighs just 0.8 oz. Oil-embedded bronze bushings and ±0.001\" tolerances at every pivot point provide smooth, virtually frictionless movement. A light linkage return spring adds about one pound to your trigger's pull weight.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e \u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan style=\"color: rgb(205, 98, 3);\"\u003ePistol or rifle configuration\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul dir=\"ltr\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eRifle:\u003c\/strong\u003e includes a standard compact butt plate and a 1.5\" extended butt plate, a cheek rest, and two steel QD sockets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePistol:\u003c\/strong\u003e includes a featureless receiver end cap with no cheek rest and a rear-facing sling socket (three QD sockets total), designed to prevent shouldering. If you later register your firearm as an SBR, a butt plate upgrade kit is available.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan style=\"color: rgb(205, 98, 3);\"\u003eMatador Arms MAT-9 compatibility\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eThe TRIAD has been tested and approved with the MAT-9 9mm upper, which has a 7.825\" barrel. Running the MAT-9 requires a 9mm magwell conversion insert in your lower for Glock or Colt magazines, or a Mean Arms EndoMag.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e \u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan style=\"color: rgb(205, 98, 3);\"\u003eWhat's included\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul dir=\"ltr\"\u003e\n\u003cli\u003eTRIAD chassis body with front trigger housing assembly (front trigger and selector installed, adjusted, and tested)\u003c\/li\u003e\n\u003cli\u003eMatador Arms MAT-9 installation kit\u003c\/li\u003e\n\u003cli\u003eBarrel extension\u003c\/li\u003e\n\u003cli\u003eHandguard extension\u003c\/li\u003e\n\u003cli\u003eAll internal and assembly components (no AR lower parts kit needed)\u003c\/li\u003e\n\u003cli\u003eAssembly wrenches and instructions\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan style=\"color: rgb(205, 98, 3);\"\u003eAdditional components required\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul dir=\"ltr\"\u003e\n\u003cli\u003eMatador Arms MAT-9 upper receiver\u003c\/li\u003e\n\u003cli\u003eStandard forged mil-spec AR lower receiver\u003c\/li\u003e\n\u003cli\u003e9mm magwell insert (Glock or Colt magazines) or Mean Arms EndoMag\u003c\/li\u003e\n\u003cli\u003eAR bolt catch with spring, pin, and plunger\u003c\/li\u003e\n\u003cli\u003eSingle-stage, flat-faced AR trigger\u003c\/li\u003e\n\u003cli\u003e3\/8\" drive ratchet for assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan style=\"color: rgb(205, 98, 3);\"\u003eLower receiver compatibility\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eThe TRIAD requires a standard forged mil-spec AR lower receiver. Billet lowers and lowers with integrated trigger guards are not compatible. Verified compatible lowers include PSA, Colt, Anderson, Aero Precision (without integrated trigger guard), and Spikes Tactical (without integrated trigger guard).\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e \u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan style=\"color: rgb(205, 98, 3);\"\u003eTrigger compatibility\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eAny single-stage trigger with a flat (not curved) face should work. We recommend a short-reset cassette trigger for best performance. CMC and Radian Vertex triggers \u003cstrong\u003eare not\u003c\/strong\u003e compatible due to their size.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e \u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan style=\"color: rgb(205, 98, 3);\"\u003eAssembly\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eAssembly is straightforward and takes about 30 minutes. Remove the left chassis half, install your lower with the trigger and bolt catch already in place, reinstall the chassis half, and adjust the trigger actuator. Then install the end cap or butt plate and mount the M-LOK front takedown lug on your upper.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e \u003c\/p\u003e\n\u003cdiv dir=\"ltr\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eSpecification\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength of pull\u003c\/td\u003e\n\u003ctd\u003e14.25\" (15.75\" with 1.5\" extended butt plate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible barrel\u003c\/td\u003e\n\u003ctd\u003eMAT-9, 7.825\" (9mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMain chassis\u003c\/td\u003e\n\u003ctd\u003eInjection-molded, 30% glass-reinforced DuPont Zytel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan style=\"color: rgb(205, 98, 3);\"\u003eConstruction and included components\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul dir=\"ltr\"\u003e\n\u003cli\u003e6061 aluminum front trigger housing\u003c\/li\u003e\n\u003cli\u003e7075 aluminum front trigger\u003c\/li\u003e\n\u003cli\u003eThree 4140 steel anti-walk trigger pins\u003c\/li\u003e\n\u003cli\u003eA3 ambidextrous selector with detent and spring\u003c\/li\u003e\n\u003cli\u003eQPQ-coated 17-4 stainless steel front trigger linkage\u003c\/li\u003e\n\u003cli\u003e7075 aluminum transfer bar and rear linkage with 841 oil-embedded bronze bushings\u003c\/li\u003e\n\u003cli\u003eAcetal (Delrin) guide and trigger actuator\u003c\/li\u003e\n\u003cli\u003eInjection-molded, 30% glass-reinforced Zytel main chassis housing\u003c\/li\u003e\n\u003cli\u003e4140 steel and 7075 aluminum threaded chassis inserts\u003c\/li\u003e\n\u003cli\u003e4140 steel QD sockets: two on rifle configurations, three on pistol configurations\u003c\/li\u003e\n\u003cli\u003e4140 steel magazine release\u003c\/li\u003e\n\u003cli\u003e7075 aluminum extended right-side magazine release button and left-side lever\u003c\/li\u003e\n\u003cli\u003eThree 4140 steel ball-detent takedown pins\u003c\/li\u003e\n\u003cli\u003eA3 Xeno-patterned, reduced-angle polymer grip\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan style=\"color: rgb(205, 98, 3);\"\u003eLegal compliance\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eWith its 7.825\" barrel, the MAT-9 must be built in pistol configuration, or registered as a short-barreled rifle (SBR) with the ATF before being assembled in rifle configuration. You are responsible for ensuring your configuration complies with all federal, state, and local laws, including the National Firearms Act (NFA) and Gun Control Act (GCA).\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e \u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe TRIAD is a chassis, not a lower receiver. It is an unregulated accessory and ships directly to your door with no FFL transfer required.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e \u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eImportant: \u003ca href=\"https:\/\/a3industries.com\/pages\/faq#triad\"\u003eReview the TRIAD Info FAQ\u003c\/a\u003e before ordering for full configuration details, compatibility requirements, and specifications.\u003c\/p\u003e","brand":"A3 Industries","offers":[{"title":"Rifle","offer_id":67674489782487,"sku":"R-MBC-MAT-0","price":549.9,"currency_code":"USD","in_stock":false},{"title":"Pistol","offer_id":67674489913559,"sku":"P-MBC-MAT-0","price":529.9,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/1327\/2791\/files\/P1013361-Enhanced-NR__63195__26387.1763061822.jpg?v=1789667156","url":"https:\/\/a3industries.com\/products\/matador-mat-9-triad-bullpup-chassis","provider":"A3 Industries","version":"1.0","type":"link"}