Product DescriptionBuilt for dependable low-light aiming, the Troy Ind Tritium Front Folding BattleSight mounts to any Picatinny rail on AR-platform rifles and delivers fast, intuitive target acquisition. A tritium-illuminated A2 front post provides a constant glow without batteries, while a rugged stainless-steel cross-lock keeps the sight upright and zeroed under hard use. The folding design deploys quickly and locks positively, and the aircraft-grade aluminum body with black hardcoat anodized finish is engineered to withstand duty conditions on M4/M16 rifles.Product Highlights Tritium-illuminated A2 front post for clear sight picture in low light Push-button folding front sight with secure stainless-steel cross-lock Picatinny rail mount for AR-platform rifles including M4/M16 Durable aircraft-grade aluminum with stainless-steel components; black hardcoat anodized Elevation adjustments require a front sight tool Specs Brand: Troy Ind Manufacturer Part Number: SSIGFBSFMBT01 UPC: 812699011096 Model: Tritium Front Folding BattleSight M4 Product Type: Folding front backup iron sight with tritium illumination Color/Finish: Black Hardcoat Anodized Materials: Aircraft-grade aluminum with stainless-steel components; tritium front insert Mount Type: Picatinny Rail Firearm Fit: M4/M16; AR Platform Front Color: Green (tritium) Length: 2.20 in Width: 1.38 in Height: 0.46 in (collapsed); 1.92 in (deployed) Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.