For precision or long-range shooting, the 5-25x50 Burris Signature HD version is built with a 30mm nitrogen-filled tube. The thin crosshairs on the Fine Plex reticle are ideal for those looking for a simple and precise sight window. Great choice for NRL 22 precision rimfire matches Zero stop turrets 5x zoom system with premium, multi-coated glass for crisp, bright images New push/pull locking turrets with a wide choice of front and rear focal plane reticles Side parallax adjustment on most models Zero stop feature on all target knobs