08:34 AM EDT, 09/24/2025 (MT Newswires) -- RTX's (RTX) Raytheon and Avio USA have executed a purchase order worth up to $26 million to continue engineering work on the Mk 104 dual-thrust rocket motor, RTX said Wednesday.

The company said the new funding follows a contract signed 13 months ago for initial engineering efforts. It added that it will support progress through the critical design review phase, allow procurement of long-lead materials for qualification and enable increased and faster production capacity for solid rocket motors.

Before the order, the company said it had completed both a system requirements review and a preliminary design review with Avio USA.