Burris Knob Synergy is a revolutionary modular turret system designed to give shooters the flexibility they’ve always wanted. Now featured on the next-generation Fullfield riflescopes, Knob Synergy lets you seamlessly swap between different elevation and windage knob styles so your scope adapts to your mission, not the other way around. From hunting the backcountry to dialing for steel at distance, Knob Synergy puts control in your hands. Upgrade your knobs, not your scope