polymer-flip-up-backup-sight-front-and-rear-sight-20mm-rail
polymer-flip-up-backup-sight-front-and-rear-sight-20mm-rail, Fit on 20mm rail.Durable, high-quality sights - made with impact resistant polymer.Package includes: front and rear set of flip-up sights, Allen Key.Easy to install - Easily and securely mounts to Picatinny/Weaver rails. SHIPPING NOTICE: Free Shipping from Dallas Texas. Please allow 48 hours for processing, and 3-5 business days for delivery.