One of the fun things about the AR-15 / M4 style rifles is that they are easy to mix/match with a huge variety of accessories, including optics. That same flexibility can also be confusing. For example, a short barrel rifle can shoot very accurately at long distances, so why not use a high power scope? My answer to that question is, “Go ahead.” However, for my rifles, I use the standard of, “Have a rationale.”
The Beretta 92/M9 variant was getting pretty long in the tooth. The weapon had served our military admirably, but I had no interest in owning one initially, other than some sense of obligation due to its place in history. But now, I have a new viewpoint
Accurate shooting requires seeing the target and being able to properly aim. Properly aiming is harder than it would seem and is not to be taken for granted.
I was experiencing light primer strikes with one of my AR-15s. This particular lower has about 4,000 rounds through it.