Install this lightweight yet rugged Vortex Cantilever 30mm Ring for StrikeFire to add some extra rail space for rear back-up iron sights (BUIS) when using the StrikeFire Red Dot in conjunction with the VMX-3T magnifier. These Red Dot Sight Mounts made by Vortex Optics will move your StrikeFire forward about an inch, providing vital rail room to mount iron sights. The Vortex Cantilever 30mm Ring for StrikeFire Red Dot is compatible with most 30mm red dot sights. If you're running out of rail space for accessories, consider upgrading your optical setup with the Vortex Sport Cantilever 30mm Ring. Specifications for Vortex Cantilever 30mm Ring for StrikeFire: Manufacturer: Vortex Finish: Black Matte Weight: 6.7 oz Fabric/Material: Aluminum Features of Vortex Cantilever 30mm Ring for StrikeFire: Provides extra rail room for rear Back Up Iron Sights (BUIS) when using the StrikeFire red dot along with the VMX-3T magnifier. The cantilever ring will move the StrikeFire forward about one inch. Will work with most 30 mm red dot sights. Package Contents: Vortex Cantilever 30mm Ring for StrikeFire Vortex VIP Warranty The Vortex VIP warranty is about you, not us. It's about taking care of you after the sale. VIP stands for a Very Important Promise to you, our customer. We will repair or replace your Vortex product in the event it becomes damaged or defective-at no charge to you. If we cannot repair your product, we will replace it with a product in perfect working order of equal or better physical condition. You see, it doesn't matter how it happened, whose fault it was, or where you purchased it. You can count on the VIP Warranty for all Vortex Optics Rifle Scopes, prism scopes, red dots, rangefinders, binoculars, spotting scopes, tripods, and monoculars. Unlimited Lifetime Warranty Fully transferable No warranty card to fill out No receipt needed to hang on to If you ever have a problem, no matter the cause, we promise to take care of you Note: The VIP Warranty does not cover loss, theft, deliberate damage or cosmetic damage that does not hinder the performance of the product.