The Primary Arms SLx 3x MicroPrism Red Dot Sight has many advantages over the Primary Arms 3x32 Compact Prism Red Dot Sight including the ability to adjust the optic height with the included spacers to allow for optimal eye relief and centerline height. It also has a field of view of 38 feet compared to the 31.5 feet on the 3x32 model. Windage and elevation adjustments are capable of 80 MOA compared to 60 MOA on the 3x32 model, and on top of that the micro-prism is also night vision compatible. Which the 3x32 is not. Email us at Techsales@opticsplanet.com for more information.