Both the Vortex Viper PST 1-4x24 and the Vortex Strike Eagle 1-6x24 are great scopes for an AR-15 platform, but each has its own strengths and features to consider. The Viper PST is a high-performance option for tactical and competitive shooting, with a versatile 1-4x magnification range, precise reticle options, and rugged construction. The Strike Eagle, on the other hand, is a more budget-friendly option that still offers excellent value for the money, with a slightly wider magnification range of 1-6x and a streamlined design for quick target acquisition.

If you're looking for a scope that can handle a wide range of shooting scenarios, I'd recommend the Strike Eagle. It's a great option for those who want a versatile scope that can handle anything from close quarters to mid-range shooting. And if you're looking for a more specialized scope that can excel in one particular area, the Viper PST is worth considering, especially if you're a tactical shooter or competitor.