The TRIAD bullpup chassis for Foxtrot Mikes upper receiver rifle is a meticulously engineered platform designed to enhance the performance and ergonomics of your firearm. Crafted with precision, this chassis is not a lower receiver but a robust framework that requires a compatible lower receiver to complete your build. Durable construction - the front trigger housing and receiver are made from 6061 aluminum, ensuring lightweight strength, while the front trigger is crafted from 17-4 stainless steel with a QPQ coating for enhanced durability and corrosion resistance. Precision engineering - the chassis includes 4140 steel anti-walk trigger pins and a 17-4 stainless front trigger linkage, both treated with QPQ coating for smooth operation and longevity. The main chassis housing is constructed from 30% fiber-reinforced injection molded Zytel polymer, providing a balance of strength and weight reduction. The transfer bar and rear linkage are made from 7075 aluminum, bushed with 841 oil-embedded bronze bushings for seamless movement. The A3 Tactical ambidextrous selector with detent spring and detent allows for easy operation, while the injection molded elastomer butt-pad and cheek rest (rifle only) offer comfort during extended use. The chassis features multiple quick disconnect (QD) sockets for versatile sling attachment options and the 4140 steel mag release with 7075 extended right-side mag release button and left-sided mag release lever ensures reliable magazine changes. The chassis includes a 6061 rear threaded buffer adapter and a 6061 rear butt-plate for rifle configurations, along with a 1.5 inches extended butt-plate and rear cap with QD sling socket for pistol setups. Equipped with the rise armament RAVE 140 drop-in trigger, this chassis offers a crisp and responsive trigger pull, enhancing shooting accuracy and control. The TRIAD bullpup chassis is a testament to modern firearm innovation, combining cutting-edge materials and design to deliver a superior shooting experience. Whether for tactical applications or recreational shooting, this chassis provides the foundation for a highly adaptable and efficient firearm system.

6061 aluminum front trigger housing/receiver
17-4 stainless steel Metal injection molded (MIM) front trigger with quench-polish-quench (QPQ) coating
(3) 4140 steel anti-walk trigger pins
A3 tactical ambidextrous selector with detent spring and detent
17-4 stainless steel front trigger linkage with QPQ coating
7075 aluminum transfer bar and rear linkage, equipped with 841 oil-embedded bronze bushings
Acetal delrin guide and trigger actuator
Main chassis housing composed of 30% fiber-reinforced, injection molded Zytel polymer
30% fiber-reinforced, injection molded, 1.50 inches extended butt plate
Threaded chassis inserts made from 4140 steel and 7075 aluminum
6061 rear threaded buffer adapter
6061 rear butt plate
Injection molded elastomer butt pad and cheek rest
(2) 4140 quick-disconnect (QD) sockets
4140 steel magazine release
Extended right-side magazine release button for 7075 model
7075 left side magazine release lever
Front trigger housing cap made from injection molded Zytel polymer
Rear butt plate support composed of 30% fiber-reinforced, injection molded Zytel polymer
(3) 4140 ball detent takedown pins
A3T Xeno-patterned reduced-angle polymer grip
30% fiber-reinforced Zytel by RISE armament
RAVE 140 drop-in trigger

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