Vortex Optics Viper Riflescope 50 mm Sunshade Reduce glare and sun reflections off the objective lens by adding a 4-inch sunshade to your 50mm Viper riflescope. This black anodized sunshade uses a screw-in assembly that attaches easily. Designed specifically for the Viper 50mm riflescope to easily attach to these following models only: PST-5258, PST-5255, PST-5251, VHS-4310, VHS-4309, VHS-4315-LR, VHS-4307-LR, VHS-4307,VPR-M-06MD, VPR-M-06BDC. Covered by the Vortex VIP Warranty; Unlimited Unconditional Lifetime Guarantee