AC-130U
https://www.af.mil/About-Us/Fact-Sheets/Display/Article/104486/ac-130u/

Video: Get to Know the Angels of Death
https://www.defense.gov/Explore/Features/story/Article/1696849/get-to-know-the-angels-of-death/

AC-130 GUNSHIP Airframe Profiles
https://airman.dodlive.mil/2017/12/22/ac-130-gunship/

The badass ‘Angel of Death’: The AC-130′s history and future
https://www.airforcetimes.com/news/your-air-force/2018/01/04/the-badass-angel-of-death-the-ac-130s-history-and-future/

The Air Force’s newest, deadliest gunship just hit a major milestone
https://www.airforcetimes.com/news/your-air-force/2017/10/10/the-air-forces-newest-deadliest-gunship-just-hit-a-major-milestone/