The Reptilia AUS Mount is a one-piece riflescope mount for 35mm tube scopes, holding the optic at a 39mm (1.54in) bore height on any M1913 Picatinny rail.
One tube diameter, one bore height, one machined body. There is nothing here to shim, stack or align — that work was done on the mill.
Reptilia describes the AUS Mount as the culmination of a two-year development program driven by an end user group. It is machined from billet 7075-T6 aluminum, finished in MIL-STD Type III hardcoat anodizing, and clamps to the rail through an anti-snag spring-loaded nitrided steel clamp. This version weighs 5.9 oz (168 g) and takes a 35mm scope tube.
35mm tubes are the large end of the precision market, used where a scope needs even more internal elevation than a 34mm body can carry. Very few mounts are cut for them, which is why this one exists as its own part rather than as a 34mm mount with inserts. Reptilia's 39mm height — 1.535in, sold in the trade as 1.54in — keeps a large scope as close to the bore as its objective allows. Made in the USA.
Key Features
- 35mm tube, fixed: Machined for one ring diameter, so the scope beds on metal rather than on shims
- 39mm (1.54in) bore height: Chosen at the mill, not adjusted on the rifle
- One-piece body: Rings and base are the same part, so there is no base-to-ring joint to move
- 5.9 oz (168 g): Billet 7075-T6 aluminum in MIL-STD Type III hardcoat anodizing
- Spring-loaded steel clamp: Stays open while you place the mount, then closes flush and anti-snag
Compatibility & Fitment
Fits riflescopes with a 35mm main tube, on any M1913 Picatinny rail — the flat-top receiver of a bolt-action precision rifle, a rail-topped action, or a flat-top AR-pattern upper. Reptilia states that an objective up to 77mm will clear a flat-top Picatinny rail at this height. Tube diameter and bore height are both fixed on this listing and neither is adjustable, so measure your scope's main tube and decide your height before ordering. Reptilia makes the same 1.54in height for 30mm and 34mm tubes. There is no 35mm AUS mount at 1.70in or 1.93in in this range.
Technical Specifications
Fits | 35mm tube riflescopes, on any M1913 Picatinny rail |
Type | One-piece riflescope mount — 39mm (1.54in) bore height |
Material | Billet 7075-T6 aluminum |
Finish | MIL-STD Type III hardcoat anodized — Black Anodized, FDE Anodized |
Weight | 5.9 oz (168 g) |
Mount interface | Spring-loaded nitrided steel clamp to M1913 Picatinny |
Made in | USA |
Brand | Reptilia |
US Shipping & Support
Shipped from D&R Sports Center in the USA with fast, tracked delivery. Questions on fit, mounting or which model suits your setup? Our team is glad to help before and after your purchase.
Frequently Asked Questions
Is the mm figure a height or a tube size?
On an AUS Mount it is the scope tube diameter. This one takes a 35mm tube. Reptilia quotes bore height separately, and on this version it is 39mm (1.54in). That is the opposite of their ROF and DOT red dot mounts, where the height is the headline figure, so it is worth reading the two numbers carefully before ordering.
Will my scope fit?
Only if its main tube measures 35mm. A one-piece mount is machined to one diameter and cannot be shimmed down or opened out. Check the tube specification from the scope maker rather than measuring with a ruler, because 30mm, 34mm and 35mm are close enough to confuse by eye. Objective bells up to 77mm clear the rail at this height.
Which bore height should I choose?
Bore height sets how high your eye has to sit to see through the scope. A lower mount suits a rifle with a conventional stock and a low comb; a taller one suits a raised comb, a chassis with an adjustable cheek piece, or a shooter who wants a head-up position. Reptilia offers this mount at more than one height and they are separate products, because a one-piece mount cannot be adjusted after it is made.
Does it hold zero if I take it off?
The clamp indexes into the rail slots, so return to zero is repeatable when the mount goes back into the same slots on the same rail. Note which slot you were in before removing it, and confirm the zero on paper afterward rather than assuming it — that is ordinary practice with any Picatinny mount, not a caveat about this one.
