The Viper PA Scope shrugs off recoil, moisture and darkness while delivering the premium optical quality you need to put trophies on the wall-and for a price that's hard to believe. Premium XD low-dispersion glass increases resolution and color fidelity, resulting in crisp, sharp images. And because the best hunting happens in low light, the Viper PA features XR multi-coatings that increase light transmission with multiple anti-reflective coatings on all air-to-glass surfaces. The 30mm aircraft-grade aluminum tube is argon gas-purged and 100% waterproof, shockproof and fogproof. And to keep the optics pristine through hard use, the Viper PA features ArmorTekA(R) ultra-hard, scratch-resistant coating on all exterior lenses for added durability. And the best part? It's still one of the most affordable Scopes in the Vortex line-up. With the Vortex VIP Warranty, You Get a Very Important Promise. The Vortex VIP Warranty is about how its handled, not how it happened. Vortex promises to repair or replace a damaged or defective Vortex scope at no cost to you. If your product can not be repaired, it will be replaced. This unlimited Lifetime Warranty is fully transferable and requires no warranty card be sent in or receipt dug out. If you own it, Vortex will handle it, and that's a promise. Extra-low dispersion (XD) glass increases resolution and color fidelity XR anti-reflective fully multi-coated optics on all air-to-glass surfaces The 30mm tube is constructed of a single piece of aircraft-grade aluminum 100% waterproof, fogproof, shockproof ArmorTek coating prevents scratches, oil and dirt from damaging the external glass Capped reset turrets allow quick re-indexing of the turret (no tool needed) to zero after sighting in Side focus is easily accessible from shooting position Precision-Force Spring System ensures maximum repeatability and ease of adjustments Precision-Glide Erector System to ensure smooth magnification changes under the harshest condi