Athlon's Cantilever Mounts are made in the USA from High Strength Aluminum Alloy. Designed primarily for AR-15 and AR-10 rifles, these mounts are also compatible on various MSR platforms. A four screw ring cap design paired with a 2-nut base and recoil lug cross-bolts. A scalloped profile increases surface area while reducing mass, ensuring these rings will hold your scope tight. Features: High strength aluminum alloy constructionDesigned for flattop AR-15 & AR-10 rifles2-nut base & recoil lug cross bolts Athlon Scopes Athlon Cantilever Scope Mount 30mm 20MOA 701016