Magpul gun magazines and accessories
There are so many configurations and variations with the AR15 that I don’t think the gun is anywhere near going away. For years people bashed the M16 and AR15 for it’s well known drawbacks but improvements on manufacturing and metal designs has improved the direct impingement design that it’s way above what the M16A2 has been. Ambidexterous bolt releases and magazine releases has helped keep the gun viable for left handed shooters and now those south paws don’t have to worry about getting more gas blown in their faces than a right handed shooter.
Stocks that are adjustable and can be adapted to left handed and right handed shooting means a more proficient operator. The Magpul pmags are just a small sample of the extensive magpul product line. Their gun sights, stocks, and grips are very different and you can easily have 3-4 AR15 rifles that have multiple roles. Even though the 5.56 round has it’s limits the firearm is completely capable of being a DMR rifle if you have a good shooter and use the right kind of ammunition.