Steel is heavy duty, and that comes at the price of weight. In an effort to combat weight while retaining the rock solid performance Warne is known for, Warne created the Warne Mountain Tech ring and base line. Mountain Tech rails are available in a 0-MOA for hunters and recreational shooters and a 20-MOA version for long range applications, both will benefit from multiple ring positions for perfect alignment and eye relief. They also feature black zinc coated self-centering hardware that eliminates potential base movement under hard use. Precision CNC machined from 7075/T6 aluminum for a high strength & lightweight platform Mil-Spec hardcoat anodized finish for abrasion and corrosion resistance Bases feature black zinc coated hardware for 'Element Proof' protection Self centering tapered T-15 Torx screws Fits Picatinny & Weaver style mounts and are NATO-STANAG compatible