The Athlon Precision 30mm Medium Rings are USA-made from high-strength aluminum alloy and built for precision rifles including magnum calibers. Medium-height rings strike the balance between bolt handle clearance and a solid cheek weld on most bolt-action platforms, with a 0.993" centerline height from the top of the rail. Ring screw torque spec: 18-20 in/lbs; nut torque spec: 65 in/lbs. Key Features 4-screw ring cap with single-nut base and recoil lug cross-bolt — holds zero under heavy magnum recoil High-strength aluminum alloy construction — lightweight and durable Fits standard Picatinny and Weaver rails 0.993" ring height (center of scope tube to top of rail) Made in the USA Torque specs: ring screws 18-20 in/lbs, nut 65 in/lbs Ideal For Precision rifle shooters on bolt-action platforms who need clearance over a bull barrel or large objective bell Magnum caliber shooters — recoil lug cross-bolt design resists scope shift under heavy recoil Competitive and recreational shooters upgrading from factory rings to precision-grade mounting