This weight was pinned in to the rear of your bolt. An additional major change was the firing pin. The firing pin only had a person head and used a firing pin spring reducing body weight and mass from the firing pin. A result of the much softer primers used https://raymondbozpy.tblogz.com/little-known-facts-about-colt-10-5-inch-9mm-smg-upper-receiver-assembly-40886933