Midnight Machine B&T TP9 RPR 3-Position Kit

Midnight Machine's B&T TP9 RPR 3-Position Kit replaces the TP9 upper with a metal upper that integrates the vendor's Reciprocal Precision Reset system. The current listing says the kit also includes a new trigger shoe and an out-of-battery prevention device intended to prevent hammer follow, light primer strikes, and premature firing before the action is in battery.

Fitment is limited to the B&T TP9 on the current product page. The listing does not establish compatibility with the select-fire MP9, the TP9 Pro, or the separate APC, GHM, and SPC families. B&T identifies the civilian TP9 as a semi-automatic, locking rotating-barrel blowback host, so AR-15 bolt-carrier trip assumptions do not establish how this system works. The replacement upper is the platform-specific reset path.

The official product name is now RPR 3-Position Kit, while the storefront retains the older FR9 wording in its URL handle. Midnight Machine publishes the package contents and the upper-based design, but does not publish pull weights, installation instructions, cycle-rate data, or material specifications beyond describing the upper as metal.