Classic Firearms compares to 9mm firearms, the new Springfield Kuna and the venerable HK MP5. They reviews the features and specs of each, including the Kuna's monolithic aluminum upper, hybrid sights, and folding brace, and the MP5's classic design. Range testing at 25 and 75 yards assesses accuracy and recoil. The MP5 is noted for softer recoil, while the Kuna's bolt action is praised. They also test both firearms with a suppressor, evaluating sound reduction. Overall, they favor the MP5 for its reliability and operating system but acknowledge the Kuna's ergonomics and price.