They have been consistently and repeatedly re-manufactured over the years. There’s a plant in Ohio dedicated to their upgrades.
CC
Yes I’ve been to Lima many times. that doesn’t change the fact that the base design is 50 years old. Same with the B-52 being 70 years old and planned to be in use up to 100 years. Maybe we can have a discussion about the M2 .50 cal machine gun? Age of the design doesn’t mean something isn’t effective...