The Reptilia ROF-90 is a 12 o'clock red dot mount for the Trijicon RMR & SRO, machined as a drop-in upgrade for 34mm Reptilia AUS and Geissele Super Precision scope mounts.
One ring diameter, one optic footprint. The ROF-90 puts the red dot directly above the scope at 90°, where your eye already is.
Reptilia calls it Ring Optic Forward. The ROF-90 sits on the scope-ring cap of a 34mm mount and carries a miniature red dot at the 12 o'clock position rather than hanging it off a separate rail or an offset bracket. That keeps the dot close to the scope's centerline, so moving between magnified and unmagnified is a change of focus rather than a change of position.
It is machined from billet 7075-T6 aluminum and finished in MIL-STD Type III hardcoat anodizing, at 1.2 oz (33 g). On an AR-15 or a precision bolt gun it earns its keep at the awkward end of the range card: the scope stays set for the shot you planned, the dot takes the one that appears at 25 m, and each keeps its own zero. Made in the USA.
How It Compares
Reptilia builds three mounts on this footprint and this ring diameter, and they are three different mechanisms. The ROF-90 on this page piggybacks the red dot at 12 o'clock on top of the scope-ring cap. The 34mm ROF-45 holds the same optic at 45°, so you roll the rifle rather than shift focus. The 34mm ROF-SAR replaces the ring cap entirely instead of sitting on top of it, which carries the dot lower over the bore. All three accept the same optic, so the choice is where you want the dot rather than what will fit.
Key Features
- 90° mounting point: The dot sits at 12 o'clock directly above the scope, not offset to one side
- Drop-in upgrade: Fits 34mm Reptilia AUS and Geissele Super Precision mounts, with no extra rail or riser
- Billet 7075-T6 aluminum: Hardcoat anodized, 1.2 oz (33 g) on the rifle
- One footprint: Cut for the Trijicon RMR & SRO and nothing else, so the optic beds flat and the screws land square
- Independent zero: The red dot keeps a close-range zero while the scope keeps yours
Compatibility & Fitment
Fits Trijicon RMR and SRO, plus Holosun HS407, HE407, HS507, HE507 and HE508 series. The ROF-90 is a drop-in upgrade for 34mm Reptilia AUS mounts and 34mm Geissele Super Precision mounts only — it is not a Picatinny mount, and it will not fit a scope ring of any other diameter. Ring diameter and optic footprint are both fixed on this listing: 34mm rings, Trijicon RMR & SRO footprint. Neither is adjustable, so check both against your own mount and optic before ordering.
Technical Specifications
Fits | Trijicon RMR and SRO, plus Holosun HS407, HE407, HS507, HE507 and HE508 series |
Type | Ring-cap red dot mount, 90° (12 o'clock) |
Material | Billet 7075-T6 aluminum |
Finish | MIL-STD Type III hardcoat anodized — Black, Flat Dark Earth Anodized |
Weight | 1.2 oz (33 g) |
Mount interface | 34mm Reptilia AUS or Geissele Super Precision scope-ring cap |
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
Will the ROF-90 fit my mount?
Only if you are running a 34mm Reptilia AUS mount or a 34mm Geissele Super Precision mount. The ROF-90 sits on the ring cap of those mounts, so it is not a Picatinny mount and it will not fit a 34mm ring of another make or any other ring diameter. Check your mount's specification before ordering.
Which optics does it take?
It is cut for one footprint: Trijicon RMR and SRO, plus Holosun HS407, HE407, HS507, HE507 and HE508 series. A mount cut for another footprint will not accept your optic, because the screw positions and the recoil boss differ between them. If your red dot is not on that list, this is not the version you want.
How is this different from the ROF-45 and the ROF-SAR?
They are three different mechanisms on the same footprint. This ROF-90 piggybacks the dot at 12 o'clock on the ring cap. The 34mm ROF-45 holds it at 45 degrees, so you roll the rifle instead of changing focus. The 34mm ROF-SAR replaces the ring cap altogether, which sits the dot lower over the bore.
Does the red dot share the scope's zero?
No, and that is the point. The dot is zeroed on its own for close range while the scope keeps the zero you set for distance, so you are not re-dialing between the two. Confirm both zeros after fitting, as you would with any mount that has come off and gone back on.
