Athlon Optics Helos BTR Gen II 4-20x50 30mm Tube Rifle Scope FFP APLR6 IRMOA Reticle Black. The Helos BTR GEN2 is the exception. Advanced Fully Multi-Coated lenses and XPL coatings balance out this optic for a wide variety of conditions. Cross-over features such as Locking turrets are not just for hunting they instill confidence in mid to long range shooters as well. FFP Fully Multi-coated Lenses Direct Dial and Locking Elevation & Windage Turrets Illuminated Reticle 30mm Tube Zero Stop Specifications for Athlon Optics Helos BTR Gen II 4-20x50 30mm Tube Rifle Scope FFP: Manufacturer: Athlon Optics Objective Lens Diameter: 50 mm Magnification: 4 - 20 x Tube Diameter: 30 mm Reticle Focal Plane: First Focal Plane (FFP) Exit Pupil: 2.5 mm Illumination Color: Red Finish: Matte Field of View Linear: 9.4 - 27.8 ft at 100 yds Eye Relief: 3.6 in Color: Black Weight: 27.6 oz Parallax: No Parallax Adjustment Illumination Type: LED Battery Type: CR2032 Optical Coating: Fully Multi-Coated Weather Resistance: Yes Water Resistance Level: Waterproof Shockproof: Yes Fogproof: Yes Battery Quantity: 1 Magnification Type: Variable Attachment Type: Riflescope Ring Features of Athlon Optics Helos BTR Gen II 4-20x50 30mm Tube Rifle Scope FFP First Focal Plane High Precision Erector System Side Parallax Adjustment 30 mm Tubes Illuminated Glass Reticles Exposed Turrets Waterproof Argon Purged Advanced fully multi-coated XPL Coating Locking Turrets Precision Zero Stop Package Contents: Athlon Optics Helos BTR Gen II 4-20x50 30mm Tube Rifle Scope FFP Athlon Optics 214108: Helos BTR Gen II 4-20x50 30mm Tube Rifle Scope FFP APLR6 IRMOA Reticle Black