The Guntec USA GT-PQS 223/5.56 Rifle 'PQS' Polymer Quick Sights offer exceptional accuracy and performance tailored for serious shooters. Engineered for precision, these sights utilize lightweight yet durable materials to facilitate optimal shooting in a variety of conditions. Durable Zytel Polymer Composite construction Dual rear aperture option for versatile aiming Lightweight for effortless handling Quick installation and intuitive manipulation Steel internals for enhanced resilience Low profile design minimizes bulk Same plane design for consistent rail height Adjustable elevation knob on front sight Push button lock to prevent accidental folding Compatible with any flattop receiver/Picatinny rail Enhance your shooting accuracy and reliability with the Guntec USA 'PQS' Polymer Quick Sights.