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![TRIAD BULLPUP CHASSIS for PSA JAKL UPPER RECEIVER TRIAD BULLPUP CHASSIS for PSA JAKL UPPER RECEIVER](https://cdn11.bigcommerce.com/s-iv9a8pp5ge/images/stencil/500x500/products/390/3206/P1013357-Enhanced-NR__17957.1723062164.jpg?c=1)
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PLEASE READ BEFORE ORDERING- This specific TRIAD kit only works with the Matador Arms MAT-9 9mm bufferless upper receivers. If you have any other brand of receiver, you will need to get the correct TRIAD kit for that receiver. While the core chassis is the same in all kits, some of the additional components such as buffers and takedown lugs are specific to the upper being used. Before ordering your TRIAD chassis, please read over our detailed TRIAD INFO FAQ page. This page lists all specs, and answers all of the "how's and why's". It is important to understand the details of each configuration, as well as the legalities, before purchasing your TRIAD pistol or rifle chassis and/or accompanying parts. |
The TRIAD is a Modular Bullpup Chassis, designed to house a standard Mil-spec AR receiver. It also uses a bufferless upper receiver. Once the Mil-spec receiver is installed, the upper receiver simply quick-pins in place just like a standard AR.
Why a Bullpup? Bullpups relocate the trigger and grip forward, greatly reducing the weapon's overall length without reducing the barrel length. This allows a bullpup to be more maneuverable and concealed more easily than a conventional weapon with a similar barrel length. The other main benefit is that it puts the center of mass closer to the shooter's core. This allows more control of the weapon, and much better balance. And if those weren't enough perks, Bullpups also have less muzzle rise, because the recoil impulse is transmitted more directly into the shooter's shoulder. This occurs because the action of the firearm is much closer to the butt plate than on conventional firearms.
One of the main benefits the TRIAD has over other Bullpup designs is the ability to swap barrel lengths and calibers in seconds with a simple upper swap (just like an AR). For example, the user could have 2 different uppers - a 10.5" 300 BLK upper with an optic, and a 16" 5.56 x 45 upper with a scope. The optics remain sighted on both uppers, and the user can swap between the two in less than a minute. There is no limit to this. During testing, we had 6 different uppers of various calibers and barrel lengths that we swapped back and forth. All were complete with optics already sighted in. By changing uppers and magazines in less than a minute, we can swap between 4 different calibers - 5.56x45, 7.62x39, 300BLK, and 9mm.
NOTE: Each brand of upper requires a specific TRIAD kit. While the core chassis is the same in all kits, some of the additional components such as buffers and takedown lugs will be different per kit. We bundle the necessary components in the appropriate kits. If you plan to use multiple uppers, don't worry, we also sell the individual items that make the kits specific. This will allow you to use various uppers on the same TRIAD chassis. These separate parts are available HERE.
WHAT COMES IN THE KIT AND HOW DOES IT WORK? The TRIAD chassis ships as a partially assembled lower chassis. The front trigger and selector will already be installed, adjusted, and tested for proper operation. The customer removes the left rear part of the chassis and installs a bare Mil-spec AR lower receiver w/trigger. Once the linkage is adjusted to the trigger, the chassis half is re-installed. If a pistol chassis was chosen, a rear buffer plug, spacer and buffer cap is then installed. If a rifle chassis is chosen, a rear buffer plug, lower butt-plate mount, and buttplate/buttpad is then installed. Rifle chassis also comes with rubber cheek riser, and a 1.5" Butt-pad spacer. NOTE: the pistol chassis can accept our butt-plate, if the customer chooses to upgrade at a later time. Buttplate kits are available on our TRIAD PARTS page HERE. WHAT ELSE DO I NEED TO MAKE A COMPLETE TRIAD FIREARM? You will need a Mil-spec AR lower receiver, an AR bolt catch (with spring, plunger, and pin), and a Matador Arms MAT-9 upper receiver. You will also need some method of converting your Mil-spec lower to 9mm. MEAN ARMS makes a speicalized mag insert that converts a standard Magpul P-MAG to 9mm. There are also various magwell inserts that will convert the magwell to accept either GLOCK magazines, or COLT magazines. Everything else is provided in the kit. |
Below is a breakdown of the kit components: