There are a handful disabled Optics in the most recent version of Arma 3, such as a trijicon SRS, trijicon ACOG, BE Meyers DCL 120, as well as the other disabled items for which there appear to be 3D models, muzzle compensators and flash-hiders.
Unless these are really legacy remnants of the development process, I would humbly request these items to be made useable by the community from an official side.
Also, if this is hinting at an attachments system for crew served weapons (DCL-120), can we get a hint towards that if possible?