Aim Sports JLB3940G: This full-size scope has 3-9x magnification with a 40mm objective. Iit is milled from one solid piece of aircraft-grade aluminum to withstand constant heavy recoil and is fogproof/ shock-resistant housing with nitrogen-filled weather-resistant seals. It is windage and elevation adjustable. The green fused multi-coated lens provides superior light and flip-up lens covers protect from dust and scratches when not in use.