Triad Bullpup Chassis – Polymer
The TRIAD Modular Bullpup Chassis is designed to house a standard Mil-spec AR receiver internally. Using a bufferless upper receiver, it converts your traditional AR into a Bullpup configuration. It is important to understand the details of each configuration, as well as the legalities, before purchasing your TRIAD chassis and/or accompanying parts.
PLEASE READ BEFORE ORDERING- This KIT is the main body and trigger housing only. Each brand of receiver has different requirements and will require a specific installation kit to complete your TRIAD.
Bullpup Advantages:
- Compact Design: Maintains barrel length while reducing overall size, improving maneuverability and concealability, especially in tight spaces like CQC scenarios.
- Improved Balance & Control: Center of mass is closer to the shooter’s core, enhancing handling, stability, and comfort during movement.
- Reduced Muzzle Rise: Shorter action-to-butt plate distance directs recoil more efficiently into the shoulder, minimizing leverage-induced muzzle climb.
Compatible Upper Receivers
| Model | Calibers | Barrel Lengths | Notes |
|---|---|---|---|
| Foxtrot Mike FM-15 | 5.56, 300BLK | 5.56: 9.00″, 12.50″, 16.00″ | Requires Foxtrot Mike Triad Installation Kit |
| Palmetto State Armory Jak’l | 5.56, 300BLK | 5.56: 10.50″, 13.70″, 16.00″300BLK: 8.50″ | Requires PSA Jak’l Triad Installation Kit |
| Brownells BRN-180 | 5.56, 300BLK, 7.62×39 | 5.56: 16.00″, 18.50″300BLK: 10.00″7.62×39: 10.50″, 16.00″ | Requires Brownells BRN-180 Triad Installation Kit |
| Matador Arms MAT-9 | 9mm | 9mm: 7.825″ | Requires magwell conversion insert for Glock or Colt magazine, or MEAN ARMS ENDOMAG |
| CMMG Dissent | 9mm, 5.56, 300BLK, 6.5 Grendel, 6mm ARC, 350 Legend | All barrel lengths **except** 6.5″ | 7.62×39 **NOT** compatible due to use of AK magazines |
| Faxon ARAK | 5.56×39, 7.62×39 | All sizes available | Requires Faxon ARAK Triad Installation Kit |
WHAT ELSE DO I NEED TO MAKE A COMPLETE TRIAD FIREARM? You will need a Mil-spec AR lower receiver, an AR bolt catch, a straight-faced AR trigger, and your choice of bufferless upper receiver along with the correct Installation kit.
Specifications:
- Front Trigger Housing/Receiver: 6061 Aluminum
- Front Trigger: 7075 Aluminum
- Anti-Walk Trigger Pins: 4140 Steel (x3)
- Ambi Selector: A3 with Detent Spring & Detent
- Front Trigger Linkage: 17-4 Stainless with QPQ Coating
- Transfer Bar & Rear Linkage: 7075 Aluminum, bushed with 841 Oil-Embedded Bronze Bushings
- Guide & Trigger Actuator: Acetal Delrin
- Main Chassis Housing: 30% Glass-Reinforced Injection-Molded Zytel Polymer
- Threaded Chassis Inserts: 4140 Steel & 7075 Aluminum
- Quick-Disconnect (QD) Sockets: 4140 Steel – x2 on rifle, x3 on pistol
- Magazine Release: 4140 Steel
- Extended Right-Side Mag Release Button: 7075 Aluminum
- Left-Side Mag Release Lever: 7075 Aluminum
- Ball Detent Takedown Pins: 4140 Steel (x3)
- Grip: A3 XENO-Patterned Reduced Angle Polymer
