Can this souped-up .45-caliber pistol round generate 10mm Auto like levels of performance? And from a nearly stock .45 ACP ...

The gun was first deployed in 1971 as the Mk 45 Mod 0, and has been updated in the more than five decades since.

It is a full-size semi-auto pistol and, as its name suggests, is chambered for America’s big-bore defensive round, .45 ACP. The gun is recoil operated and fitted with a 4.25” stainless steel ...

American missiles were used to engage most of the enemy targets, but the destroyer was forced to employ the five-inch gun ...