monstrum p330-b marksman 3x prism scope (black) monstrum the marksman 3x30 prism scope is as sharp as it looks. featuring a hard annodized aluminum finish with 3x magnification. ideal for rapid mid-range target acquisition out to 200 yards. this scope uses a glass prism optical system rather than a refracting lens system like traditional scopes, allowing for better optical quality in a much smaller package. the crystal clear optics give a comfortable eye relief of 3.5 inches. the reticle can illuminate in red or green with multiple brightness levels or viewed in black when off to cover most lighting environments