The Trijicon Colt Knob Mount AC22036 is a purpose-built 34mm riflescope mounting solution that offers serious hunters and precision rifle shooters adjustable eye relief and the familiar Colt thumbscrew attachment style in a clean, practical mount designed specifically for 34mm main tube riflescopes on 1913 Picatinny rail-equipped platforms. The Knob Mount AC22036 is specifically compatible with riflescopes that feature 34mm main tubes — the tube diameter that Trijicon's premium Tenmile, Tenmile HX, and other serious long-range and hunting riflescope configurations use for the additional internal adjustment range and optical system space that 34mm construction provides. For 34mm riflescope owners who want the familiar Colt thumbscrew attachment style in a purpose-built factory Trijicon mount, the AC22036 delivers the correct tube diameter fit alongside the practical adjustable eye relief feature that serious rifle shooters specifically value. The Trijicon Colt Knob Mount AC22036 adjustable eye relief design gives shooters the flexibility to position the rings in the correct eye relief location for their specific rifle platform and shooting style — simply remove the base screws, move the rings to the desired position, and reinstall the screws for the exact eye relief alignment that consistent, comfortable aiming demands. The straightforward adjustment process puts the scope exactly where it needs to be, with no complicated tools or procedures required. The scope mounts AC22036 Colt-style thumbscrews allow the mount to firmly attach to 1913 Picatinny rails with ease — the familiar, proven attachment mechanism that gives serious shooters the tool-free installation and removal that practical field and competition use demands. Features: Compatible with 34mm main tube riflescopes Adjustable eye relief — move rings to the desired position Colt-style thumbscrews for a firm 1913 Picatinny rail attachment Simple screw removal and reinstall for ring position adjustment Factory Trijicon manufacturing quality and correct fitment Purpose-built for serious hunting and precision rifle applications Trijicon 34mm Riflescope Colt Knob Mount AC22036