While Leupold still waterproof other optics with bone-dry nitrogen – technology pioneered by Leupold® – the Leupold 115389 Mark AR MOD 1 3-9X40mm Rifle Scope features an exclusive, proprietary Argon/Krypton gas blend. Its advantages are two fold: it nearly eliminates the effects of thermal shock, and the Argon/Krypton molecules are significantly larger than nitrogen molecules, reducing the diffusion of gases sealed inside your scope even more than our proven nitrogen technology already does. Leupold pioneered riflescope waterproofing, and now with Argon/Krypton we're exceeding the standards they set themselves.
- 2nd Generation Argon/Krypton Waterproofing
- One inch Maintube
- MARK AR® MOD 1 P5 Dial
- Multicoat 4