Question: The Sturmgewehr 52 and the FG 42 are both types of which kind of gun?
Sentence (from "5&quot;/54 caliber Mark 42 gun"): United States naval gun terminology indicates the gun fires a projectile 5 in in diameter, and the barrel is 54 calibers long (barrel length is 5" × 54 = 270" or 6.9 meters.)
Relevant evidence: No