The Steiner P-Series cantilever mount offers the perfect mounting solution for AR-15 and flattop platforms. Machined from rugged aluminum alloy to be incredibly strong, yet lightweight. This cantilevered mount combines ruggedness, lightweight and adaptability to be the perfect addition to your platform.#5973: 30mm diameter, 35 mm height#5974: 34mm diameter, 35 mm heightT-SERIES AR MOUNT FEATURES: designed to fit 30 & 34mm scopesavailable in 35mm heightmounts to any picatinny style raildesigned to offer perfect eye relief on modern AR-pattern rifles Steiner P-Series 34mm MSR Mount 5974