Garand Thumb reviews the Beretta M9A4 handgun, discussing its history, military use, and updates from the original M9. He explains that the M9A4 was submitted as a potential replacement for the M9 in the United States military but was not selected.

The review covers the M9A4's features, such as its threaded barrel, magazine capacity, and updated trigger. He highlights the weapon's smooth recoil and accuracy, while also noting some drawbacks, including the finish and holster compatibility. Overall, his evaluation is positive, describing the M9A4 as a reliable and accurate handgun.