[High-Tech] Reflex Sight + Scope: "can be used, but not with magnifying scopes"

[Anthony]

The general realism problem you'll run into with ranged combat in GURPS is that it's really tuned for being gameable, not being a reality simulator; all other things being equal, accuracy drops off with range much faster than the GURPS range modifiers, but all other things are rarely equal so under game conditions the existing rules do reasonably well.