The BSA Sweet .17 AO Rifle Scope is specifically designed for the .17 HMR. These scopes feature fully coated lenses, an adjustable objective, 30/30 reticle, 2-pc Dovetail rings and generous eye-relief. This Sweet 17 AO series features a ballistically calibrated turret for the 17 gr cartidge. Product Features Matte black finish Waterproof, shockproof and fogproof Product Specifications MAGNIFICATION LOW: 3X MAGNIFICATION HIGH: 9X OBJECTIVE LENS DIA. (mm): 40 ADJUSTMENT GRADUATION (MOA): 1/4 LENS COATING: Fully Coated W/E ADJUSTMENT RANGE: 35 EYE RELIEF (Inches): 3 FOV LOW @ 100' (ft): 34.2 FOV HIGH @ 100' (ft): 11.5 PARALLAX SETTING (yds): 7.5 to Inf. ADJUSTABLE OBJECTIVE: Yes SIDE PARALLAX ADJUSTMENT: No RETICLE TYPE: 30/30 FOGPROOF: Yes SHOCKPROOF: Yes WATERPROOF: Yes RINGS / MOUNT INCLUDED: Yes RING / MOUNT TYPE: Two-Piece Dovetail