Any issues regarding manufacture of individual models when they were first produced is pretty much irrelevant, as of this late date; it's not even a new century anymore. 🙂
What's more important is how well it has been cared for (or not) during its life and how recently it has been serviced.
Pick the M4 variation you prefer and get one that's been serviced by one of the premier techs, or acquire one and have it serviced. You'll be good to go for decades.
What's more important is how well it has been cared for (or not) during its life and how recently it has been serviced.
Pick the M4 variation you prefer and get one that's been serviced by one of the premier techs, or acquire one and have it serviced. You'll be good to go for decades.