One model to consider for the Springfield M1A is the Vortex Viper PST Gen II. This scope offers a wide magnification range, from 5-25x, making it versatile for both close-range and long-range shooting. It also features a first focal plane reticle, which means that the reticle will increase or decrease in size as the magnification is adjusted, allowing for more accurate aiming at any range.

The Viper HST 6-24x50 is also built to withstand tough conditions, with a shockproof and waterproof design that can handle any weather or terrain. Additionally, it comes with Vortex's VIP warranty, which guarantees the scope against defects for life, giving the buyer peace of mind knowing that their investment is protected.

Overall, the Vortex Viper PST Gen II is a great option to pair with the Springfield M1A rifle, providing the user with reliable and accurate aiming for a variety of shooting scenarios.