[DAIadvisor]

I am purchasing an A3A1 AUG with newer "railed" scope. I absolutely hate the new tacticool look and want it to resemble classic AUG. What's the possibility of getting the STG77 (40th anniversary) type scope for it? Any info appreciated.

 

[Zudrick]

While I am not sure about the anniversary scope, this might be something to consider to avoid the rails.

Talon Scope Mount for AUG M1 - Manticore Arms

Please Note: The Talon Scope Mount for the AUG A3 M1 does not fit the AUG A3; the correct item for the AUG A3 is SKU MA-8235. Neither scope mount is compatible with the MSAR. The Talon Scope Mount for AUG M1 allows for mounting of a 30mm scope (or one inch scope with rings spacers, not...

manticorearms.com

 

[Case]

The original STG-77 AUG optic is a part of the Receiver and it is not detachable like the modern A3M1 .
You could try to find a A2 or SA Version optic.

As a side note I'm helping out on a project that would allow you to integrate the Newer optic with a pick rail together .