Strike Industries Strike Polymer Backup Sights Features The Strike Industries Strike Polymer Backup Sights are built from lightweight and durable SI Polymer Extreme material reinforced with a steel mounting tab and insert that handles wear and tear without major issues. Both the front and rear sights fold down low enough to stay out of the way when not in use preventing snagging on gear during movement or storage. Because the sights lack an internal spring they will not accidentally deploy when the shooter doesn t need them reducing the chance of an unwanted obstruction in the sight picture. Mounting is straightforward on any Picatinny rail equipped AR-15 with installation typically taking just a few minutes. The rear sight features an easy to use windage adjustment knob while the front sight s elevation is adjusted quickly and without tools a convenience that speeds up zeroing at the range. Dual apertures on the rear sight give shooters flexibility between a larger 4.70mm aperture for longer eye relief low light conditions and faster target acquisition and a smaller 1.75mm aperture for shorter eye relief and greater precision. The sights are slightly taller than standard A2 sights by 2.3mm and are optimized to be used as a matched pair rather than mixed with other sight systems. Finished in black and weighing just 0.60 ounces the sights add minimal bulk to the rifle while providing a reliable backup sighting option. Whether used as a primary sighting system or as true backup sights behind a red dot or magnified optic the Strike Polymer Backup Sights offer tool-less adjustment at an accessible price point. The built in bonus sights when folded down give shooters an added layer of redundancy that few other backup sight systems offer at this price. This combination of durability adjustability and value makes the sights a practical addition to nearly any AR-15 build. The Strike Industries Strike Polymer Backup Sights are for sale at GrabAGun for AR-15 shooters who want dependable iron sights as a primary or backup sighting solution. Strike Industries Strike Polymer Backup Sights Specifications Manufacturer: Strike Industries Model: Strike Polymer Backup Sights Compatible Hosts: AR-15 Picatinny Rail Color: Black Material: Steel / Polymer Style: Folding Back Up Height: 1.97 Rear Aperture Sizes: 4.70mm and 1.75mm Weight: 0.60 oz Available At: GrabAGun