TANDEMKROSS UPRISER Chassis (Ruger PC Carbine)

The Ruger PC Carbine is a genuinely good action wrapped in furniture built to a price. The UPRISER is TANDEMKROSS's answer: a reinforced polymer chassis that keeps the weight low while opening the rifle to the entire AR grip, buffer tube, stock, and brace aftermarket. Anything mil-spec bolts on, and AR grips fit with or without a beavertail.

The magazine release is the feature that justifies the chassis on a timer. Instead of reaching under the receiver with the support hand, the shooter lifts the trigger finger straight off the trigger and presses a release sitting right there, which removes the grip break from the reload entirely. TANDEMKROSS pairs it with a wide beveled flared magwell that funnels the magazine in rather than making the shooter find the opening.

The package includes the AR-15 hiveGrip, which is worth more than a throw-in. It is molded from an impact and vibration dampening material with defined finger grooves and a slim profile, and the interior is hollow with an O-ring sealed removable base for water-resistant storage of tools or spare rounds.

The stock and grip adapter ships in two geometries and the choice actually changes how the rifle shoots. The angled adapter drops the buffer tube 12 degrees, which raises the sight picture toward the face and suits irons or a low-mounted optic while producing a natural cheek weld. The straight adapter matches conventional AR ergonomics and is the right pick for a riser-mounted optic, a laser, or night vision.

Fitment covers PC Carbines in 9mm and .40 S&W and the PC Charger, and works with both Ruger factory and Midwest Industries aftermarket M-LOK handguards. Two limits: Ruger chassis models require a second takedown screw for installation, and the UPRISER does not fit models factory equipped with the Magpul PC Backpacker stock such as model 19130. The chassis is not a serialized part.