Am Def Holosun 509t Qr Lower 1/3

The Am Def Holosun 509t Qr Lower 1/3 is a purpose-built mounting solution designed for operators utilizing the Holosun 509T enclosed emitter red dot on modern carbines and AR pistols. This mount provides a lower 1/3 co-witness height, allowing for a clear sight picture through the optic while keeping iron sights visible for secondary reference.

Constructed from a single piece of 6061 T6 aluminum, the Am Def Holosun 509t Qr Lower 1/3 features a Type III hard coat Mil-Spec anodized finish that ensures superior wear and corrosion resistance. The patented Auto Lock Lever system offers a secure lock-up without the need for proprietary tools, accommodating both in-spec and out-of-spec rail systems.

This robust construction ensures that the optic maintains a consistent zero even after repeated mounting and dismounting cycles. The one-piece design maximizes structural integrity while minimizing the overall footprint on the receiver, making it an ideal choice for professionals who require reliability and speed in high-stress environments.