Weaver Grand Slam Riflescope w/Dual-X Reticle & Silver Finish All Grand Slam scopes are equipped with the Micro-Tac 4 point adjustment system, the best in the industry. Fully multi-coated lenses reduce glare, increase image brightness and give you edge to edge clarity - they're outstanding in low light situations. Grand Slam scopes also feature a fast focus eyepiece adjustment ring to adjust the scope perfectly to your eye. The Weaver "sure grip" power ring helps you find and adjust the scopes variables, even with heavy hunting gloves on. Finally, the Grand Slams solid, one piece construction makes them waterproof, fogproof and shockproof so they will last for years to come.