HHA Optimizer Horizon - Adjustable Firearm Sighting System HHA Sports has a new scope mount yardage sighting system for firearms. As I see it, it is a takeoff on their wildly successful Speed Dial Optimizer for crossbows. We have sold a ton of the Speed Dial Optimizers to our TAC 15 crossbow customers. That unit has a terrific reputation. This new unit will benefit mostly shooters using the less flat shooting firearms such as rimfire, blackpowder, shotgun slugs and some of the tactical rounds. The concept involves a wheel with yardages marked on it, matched to the trajectory of your own firearm. So who wants to get one of these to try out? A couple of units are available. .