Ready your rifles with a versatile Mark 4HD. We took the performance of its predecessors and gave it a slimmer maintube that's been packed full of professional-grade features. The Mark 4HD provides you with an accurate and reliable option for close-quarter engagements, long-range dominance, and everything in between. They're available with a three-turn elevation dial for unmatched confidence at extreme distances, a precise ZeroLock windage adjustment that wont budge when knocked around, and a side focus that delivers tack-sharp images as close as 25 yards. Elevation adjustment type M5C3.