IMI-Defense PCS Rear Polymer Flip Up Sight Shipped from Israel. Delivery takes up to 7-14 business days. The IMI Defense Flip-Up Sight set is a high end injection molded flip up sight set compatible with most Picatinny railed weapon platforms. Designed and manufactured in Israel under the uncompromising IMI Defense standards to contain all the necessary features for Tactical, Sports or Recreational shooters around the world. Material: Fiber Enforced Polymer Compound (High Impact Resistance). Fits Mil-Spec 1913/STANAG 4694 rail system (Picatinny). Provides Identical Bore to Sight height as M4/M16/AR Standard Irons. Indexed Front Sight Elevation Drum, no tool needed for calibration. Dual aperture and Ambidextrous windage adjustment on Rear Sight. Spring loaded flip-up system for quick deployment. Low profile and light weight.Weight (Per Set): 50gr, 1.3 oz. Height above rail - Folded: 0.5in,12.7mm | Deployed: 1.67in, 42.5mm. Length when folded: 2.35in, 59.5mm.