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The Reptilia AUS 35mm mount is a precision optic ring designed for shooters running magnified scopes on AR-platform rifles and other firearms with M1913 Picatinny rails. Built from a single piece of 7075-T6 billet aluminum and finished with military-spec hard anodize, this mount delivers the durability and repeatability serious shooters demand without the bulk. At 1.54 inches of bore height, the AUS strikes the balance between a true co-witness and a lower third co-witness setup, giving you flexibility in how you configure your rifle for both close-quarters and distance shooting.
Reptilia engineered the AUS mount after two years of development work with end users who wanted a low-profile 35mm solution that didn't compromise on strength or ease of use. The anti-snag spring-loaded clamp grabs your Picatinny rail securely and stays put, while the custom bolt system lets you dial in the fit with either a 5/32 hex wrench or a flat blade—then sit flush against the mount body for a clean, snag-free profile on your upper receiver. The hardcoat anodize is tough enough to handle field use and won't fade or chip under normal handling.
This mount will accommodate objectives up to 77mm without fouling a flat-top Picatinny rail, making it practical for most modern 35mm scopes in the 3–18x and 4–24x power ranges. Made in the USA, the AUS is a no-nonsense piece of kit that does one job well: hold your optic zero-to-zero, shoot after shoot.
| Bore Diameter | 35mm |
| Bore Height | 1.54 inches (39mm) |
| Material | 7075-T6 Billet Aluminum |
| Finish | MIL-STD Type III, Class 2 Hard Anodize |
| Rail Compatibility | M1913 Picatinny |
| Max Objective Diameter (Flat-Top) | 77mm |
| Fastener Options | 5/32 Hex or Flat Blade |
| Country of Origin | USA |
The AUS is designed for any 35mm diameter scope and will clear objectives up to 77mm in diameter when mounted on a flat-top Picatinny rail. It works with modern hunting and precision rifle scopes in the mid-to-high magnification ranges.
At 1.54 inches of center-to-rail distance, the AUS mount sits between true co-witness and lower-third co-witness height. This height works well for rifles where you want sight picture flexibility without an extreme riser or ultra-low setup.
The mount clamps directly to any M1913 Picatinny rail via a spring-loaded anti-snag mechanism. Tighten the custom bolt with either a 5/32 hex wrench or a flat-blade screwdriver until the mount is secure and the bolt sits flush with the body.
Yes, the AUS is manufactured in the United States from 7075-T6 billet aluminum and finished with military-specification hard anodize.
SKU: 114464741 • Width: 4.25in • Height: 2.5in • Depth: 7.25in • Weight: 0.63oz