Description
Atlas Gunworks’ frame-mounted optic mount puts an RTS2-footprint red dot low over the dust cover of a 2011 or 1911 open-division pistol. It is machined from a solid billet of aluminium and black anodised, with a built-in blast shield to keep comp gases off the lens. The mount uses the standard five-hole, 0.375 in-spaced frame pattern found on USPSA-style pistols and is sized for wide dust covers (frame as wide as the slide); narrow-dust-cover guns such as older STI frames need an additional shim. Optics with the RTS2 footprint fit directly: C-More RTS2 and STS, SIG Romeo3 Max and Romeo3 XL, and the Vortex Razor. Atlas supplies 5-40 frame screws (trim to length if needed) and M4 x 0.7 sight screws; the screws packed with your sight are not compatible. Atlas part 6301-33010. Fitting requires drilling and tapping the frame if it is not already cut – ask our gunsmith.
Key features
- Billet aluminium, black anodised (silver also made)
- RTS2 footprint: C-More RTS2/STS, SIG Romeo3 Max/XL, Vortex Razor
- Standard 5-hole, 0.375 in frame spacing; wide dust cover
- Built-in blast shield
- Includes 5-40 frame screws and M4 x 0.7 sight screws
- Atlas Gunworks part 6301-33010 (UPC 810040511325); made in the USA
Frequently asked questions
Does it fit a Leupold DeltaPoint Pro?
No – this is the RTS2-footprint mount. Atlas makes a separate DeltaPoint Pro mount; ask us.
Will it fit my STI?
Only wide-dust-cover frames fit directly; older narrow-dust-cover STI frames need a spacer.
Is a licence needed?
No. It is a handgun part, not a firearm, and ships Australia-wide; your pistol must of course be held on the appropriate licence.
Handgun part – not a firearm; no licence is required to purchase and it ships Australia-wide. Specifications from Atlas Gunworks. 3 Gun Tactical, Licensed Firearms Dealer 50001578, Tingalpa QLD.





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