TANDEMKROSS Manticore Trigger Assembly (Ruger 10/22)

The Manticore is what happens when TANDEMKROSS stops selling 10/22 fire control parts one at a time and ships the whole thing assembled. The housing is CNC machined from aluminum with a black anodized finish, and it arrives with the Ultimate Trigger Kit, the Cornerstone Rotary Safety, the Fireswitch extended magazine release, and the Bolt Keeper extended bolt lock already installed and timed together.

The machined housing does something the polymer factory shell cannot: it gives the Ultimate Trigger Kit a pull-weight adjustment screw on top of the existing over-travel screw. Every Manticore leaves the factory set at 3 to 3.5 lb, and a single screw takes it from roughly 2 lb up past 5 lb. That upper range is not a throwaway feature, since several competition leagues impose minimum pull weights and a heavier break is genuinely useful when running new shooters.

The control upgrades are the reason to buy the assembly rather than the kit. The ambidextrous rotary safety replaces the cross-bolt button with an AR-style toggle that both right and left handed shooters can flip without breaking grip. The bi-directional magazine release drops mags on a push or a pull. The Bolt Keeper both simplifies locking the bolt back and makes releasing it a one-motion pull. There is also an index shelf at the front top corner of the enlarged trigger guard for a consistent finger-off-trigger reference. Two fitment limits are worth knowing before checkout: TANDEMKROSS recommends at least 8 inches of rifling for reliable reset and cycling, and the assembly does not fit the Tactical Solutions X-Ring receiver.