The Marine Corps’ new CH-53K King Stallion heavy-lift helicopter is on track to surpass the F-35A Joint Strike Fighter in unit cost, a lawmaker said this month.

The still-in-development King Stallion is designed to replace the Marines’ CH-53E Super Stallion choppers, which are reaching the end of their service lives. But while Super Stallions cost about $24 million apiece, or $41 million in current dollars, the Sikorsky/Lockheed Martin King Stallion began with a per-unit price tag of about $95 million — and there are indications it could rise further.

Citing a 2016 Selected Acquisition Report from the Government Accountability Office, Rep. Niki Tsongas, D-Mass., said the CH-53K estimated unit cost had increased about 14 percent from the baseline estimate. Information provided directly from the Marine Corps to House lawmakers this year, she said, indicated that the choppers were now expected to cost 22 percent more than the baseline estimate, or $122 million per copy.

“The Marine Corps intends to buy 200 of these aircraft, so that cost growth multiplied times 200 is a heck of a lot of money,” Tsongas said during a March 10 hearing before a House Armed Services subcommittee. “And even if there is no additional cost growth, it seems worth pointing out that $122 million per aircraft in 2006 dollars exceeds the current cost of an F-35A aircraft for the Air Force by a significant margin.”

The most recent lot of Lockheed Martin F-35As cost $94.6 million apiece, down from over $100 million in previous buys. The Marine Corps’ F-35B and the Navy’s F-35C, modified for ship take-off and landing, remain slightly over $120 million apiece.

Previously the Marines’ Bell-Boeing V-22 Osprey held the distinction of being the priciest rotorcraft in the air, at some $72 million apiece. The Lockheed Martin VH-71 Kestrel, a planned replacement for the Marine One presidential transport fleet, did at one point reach a $400 million unit cost amid massive overruns, but the aircraft never entered full-rate production, and the program was officially canceled in 2009.

But the Marines’ head of Programs and Resources said the service is prepared to shoulder the cost of their cutting-edge chopper.

Speaking before the committee March 10, Lt. Gen. Gary Thomas noted that the Marine Corps expected the unit cost to drop to below $89 million when the aircraft enters full-rate production, sometime between 2019 and 2022. As the F-35A unit cost is expected to drop as low as $85 million in the same time-frame, the two programs will remain close in that regard.

“That’s still very expensive; we’re working very hard with the program office and the vendor to keep the cost down and to drive value for the taxpayer,” Thomas said. “In terms of, can we afford it, we do have a plan without our topline that would account for purchases of the new aircraft we desire.”

A spokeswoman for Lockheed Martin, Erin Cox, said in a statement provided to Military.com that the King Stallion program was now on track and meeting goals.

“The CH-53K heavy-lift helicopter, as previously known and reported, overcame developmental issues as are common with new, highly complex programs and is now completely on track and scheduled for Milestone C review leading to initial low rate production,” she said. “The program is performing extremely well.”

Tsongas pointed out that the Marine Corps is now spending three times as much on aviation modernization as it is on modernization of ground vehicles, despite being at its core a ground force. Thomas called the spending plan balanced, noting that the service had active plans to modernize its vehicles, but the realities of aviation costs and the urgency to replace aging platforms required more outlay on aircraft.

The first CH-53K aircraft are expected to reach initial operational capability in 2019. They are designed to carry an external load of 27,000 pounds, more than three times the capacity of the CH-53E Super Stallion, and feature a wider cabin to carry troops and gear.