Highly recommend for 50 yards - SIG SAUER Tango4 1-4x24mm Rifle Scope, 30mm Tube, First Focal Plane (FFP)

This is an excellent optic for the price. The FFP reticle is nearly unusable at 1x zoom, but very usable with illumination at 2x. Once you get above 2x the reticle is excellent. The scope illumination is great for low light and alright for daylight if you are standing in a shaded area. The reticle is clear enough that it's useful un-illuminated in bright light if the battery dies. The rang of settings for focus, windage, etc is so great that it's virtually impossible for you not to be able to sight in this scope, no matter your mounting configuration.