dunno why they don’t think it could be the C-145 though?

U.S. plane with a civilian-style outward appearance and the ability to launch munitions from within its fuselage carried out the first controversial strike on an alleged drug smuggling boat, according to multiple reports. Questions have been raised about this line of reporting. However, there are very real discreet munition launch options available for aircraft that can retain a distinctly civilian outward appearance, enabled heavily by one specific system called the Common Launch Tube (CLT).

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CLT launchers mounted internally are typically reloadable in flight, offering magazine depth benefits and giving the crew more flexibility to select the most appropriate payload for the task at hand, as well as to just launch multiple payloads in relatively rapid succession. With launchers built into doors, it is also easier to add or remove this capability, as desired. This, in turn, can enhance its discreet nature, as the launchers might only be installed right before a mission and removed immediately afterward. In this way, there could be little to no obvious outward signs that an aircraft has this capability during routine movements or other day-to-day activities.

Launch systems built into certain parts of an aircraft might not even be readily apparent, to begin with. One company, Fulcrum Concepts, openly offers a launch system compatible with the CLT that fits into the rear of the engine nacelles on variants of the Beechcraft King Air, which is something the U.S. military has at least tested in the past.

Within the U.S. military, Air Force Special Operations Command (AFSOC) publicly operates various fixed-wing aircraft, such as its U-28A Dracos and C-146A Wolfhounds. The U-28As are intelligence, surveillance, and reconnaissance (ISR) aircraft, while the C-146s are light transports. AFSOC has also flown ISR-configured variants of the Beechcraft King Air over the years. Any of these types would be well-suited to these kinds of discreet CLT launcher installations on account of the space available in their main cabins. It’s highly probable that this is an option for some of them already. These planes also often have minimal U.S. military markings. Sometimes they wear civilian-type paint schemes, as is notably the case with the Wolfhounds today and has been observed on U-28s, or related types in U.S. service, in the past.

a good article about the C-146

In 2009, two programs were launched to meet their needs for light- and medium-lift transport aircraft using PZL M28 Skytruck light-fixed wing and Dornier 328 medium-fixed wing aircraft respectively. The former was designated as C-145A Combat Coyote, while the latter as C-146A Wolfhound. Sierra Nevada Corporation (SNC) was contracted by the USAFSOC to supply what was initially 17 Dornier 328s (later increased to 21) in 2011. As it took two years for SNC to prepare and deliver the 17 aircraft, the AFSOC continued operating Dash 8 aircraft for four years.

https://www.key.aero/article/us-special-ops-c-146a-wolfhounds-terrorist-hunters-workhorse