The American Defense Lightweight TR QD Mount, Lower 1/3 Co-Witness (brand part no. AD-TR-LW-11-STD) drops a compact micro red dot into the lower third of the sight window, keeping standard AR iron sights visible below the dot rather than directly behind it. American Defense Mfg machines this one-piece mount for the EoTech EFLX, Leupold DeltaPoint and DeltaPoint Pro, and Vortex Defender, making it a solid choice for AR pistols and other platforms where a low-profile red dot setup matters.

Key Specifications

• Machined from 6061 T6 aluminum for a strong, lightweight one-piece body.
• Finished with hard coat T3 Mil-Spec anodize for wear and corrosion resistance.
• Set at a lower 1/3 co-witness height, keeping iron sights visible in the lower part of the optic window.
• Compatible with the EoTech EFLX, Leupold DeltaPoint/DeltaPoint Pro, and Vortex Defender mounting footprints.
• Uses the patented QD Auto Lock lever system for a secure hold on in-spec and out-of-spec rails alike.

Frequently Asked Questions

What is the difference between this and the co-witness version? This lower 1/3 mount sits the dot higher in the window so the iron sights appear only in the lower third, versus a full co-witness where the dot sits directly over the irons.

What optics does this mount fit? The EoTech EFLX, Leupold DeltaPoint and DeltaPoint Pro, and Vortex Defender.

Can I remove the optic without tools? Yes, the QD Auto Lock lever releases by hand for fast on and off in the field.

Buy the American Defense Lightweight TR QD Mount, Lower 1/3

If a lower 1/3 co-witness setup is what your build calls for, American Defense Mfg engineered the Lightweight TR mount for exactly that sight picture. See the rest of our red dot mounts and order from our Lubbock, Texas gun shop for fast, insured shipping.