AccuracyBallisticsGear ReviewsLong Range ShootingMarksmanship Examining SmartScopes with the Sig BDX 2.0 System and Sierra6BDX Scope Review BigJimFish Posted onOct 11, 2022 at 1:17 PM 14 Comments BigJimFish examines the SmartScope concept with a review of the Sig BDX 2.0 system and Sierra6 BDX 3-18x44 scope