The Meostar 1-4x22 ZD Tactical KDot RD has a 30mm maintube diameter, with its reticle placed in the rear focal plane (in front of the eyepiece) to maintain its virtual size throughout the entire magnification range. Targeting smaller game at longer distances is quite easy with the reticle location in the rear focal plane. The Meostar 1-4x22 ZD Tactical KDot RD is a versatile scope well suited for dangerous game rifles, slug guns, as well as rimfire and small/short-distance target/varmint shooting applications. A favorite of 3 gun competitors, you too will see the beauty of this scope the minute you look through it. Key Features • The Meostar Finish Advantage The supreme Meostar 1-4x22 ZD Tactical KDot RD riflescope has an aircraft aluminum alloy construction and a bead blasted exterior, as well as an ‘Elox’ andonizing process, which ensure an extremely durable and non-reflective black matte outer finish. • Meostar’s Magnificent Multicoatings Meopta has dramatically improved their light transmission per glass surface with a proprietary IMB-5501 anti reflective coatings & ION assisted applications process. Light transmission is staggeringly high at 99.8% per surface! • 30mm internal diameter tube • ±3 Dioptric correction • Soft rubber eyecup prevents injury from recoil power • Truly quadratic reticle adjustments Meopta Meostar 1-4x22 K-5.56 ZD-RD Riflescope 528210