When your red dot optic is your primary aiming solution, reliable backup iron sights are essential for maintaining accuracy and confidence in any situation. The C&H Precision Backup Iron Sights for RMR/Holosun on Glock or Walther PDP deliver a purpose-built, low-profile solution that ensures you stay on target even if your optic fails. Key Features LowWitness Profile: At just 0.285 inches tall, these sights sit only 0.075 to 0.100 inches into the optic's field of view, providing a lower 1/6 to 1/8 co-witness that minimizes obstruction while remaining fully usable as a backup. Tritium-Enhanced Visibility: The front sight features a tritium dot with yellow outline for rapid acquisition in low-light conditions, paired with a clean blacked-out rear notch. Premium Construction: CNC-machined from high-grade steel with a durable matte black, rust-resistant finish for long-term reliability under recoil and harsh environments. Direct Fit Compatibility: Designed specifically for optics-ready slides-no additional plates or modifications required for standard Glock MOS, direct-milled Glock slides (.125-inch depth), or Walther PDP models. Compatible Platforms and Optics These backup sights are optimized for a wide range of popular handguns and red dot sights, including Glock 17, 19, 34, 45, and many other models, as well as the Walther PDP. They pair seamlessly with Trijicon RMR, SRO, and Holosun 407C, 507C, 508T, and 509T optics, ensuring perfect alignment without compromising your primary optic's performance.