R3 Riflescopes provide pinpoint accuracy with SFP design and AO focus, featuring fully multi-coated optics for clear, precise views in any lighting condition. HD Optical System for increased light transmission, contrast, and resolution. Multi Coated on key areas of the optical system for increased light transmission. Multi-X reticle for a classic sight picture. Keep your glass clear with Bushnell&';s exclusive EXO Barrier(TM) lens coating that repels water, oil, dust and debris. Nitrogen purged to prevent fogging from the inside even with extreme temperature shifts. IPX7 waterproof, fog-proof, and shockproof construction. Durable aircraft grade aluminum 1inch one-piece tube. Backed up by the Bushnell Lifetime Unconditional Warranty.