HOLOSUN HS503R:
 
The HS503R is a 20mm micro sight designed for rifle and carbine applications. HS503R features a Rotary switch to select reticle intensity, Holosun’s Red Super LED with 50k hour battery life, and MRS (Multi-Reticle System) with 10 daylight and 2 night vision compatible reticle intensity settings.
 
The HS503R housing is made from 6061 aluminum and includes both a lower 1/3 co-witness mount (1.63”) and a low mount (.75”) for low-comb height rifle applications. Additional features include rubber lens covers, and a battery compartment integrated into the Rotary switch for the 2032 battery. HS503R is a versatile sight for users of all levels.
 
Lower 1/3 Cowitness Mount
Low Profile Mount
T10 L Key
Rubber Cover
User Manual
CR2032 Battery
Lens Cloth
 
Scalarworks LEAP/01:
 
From its introduction in 2014, the original Low Drag Mount featured our recoil proof ClickDrive™ Quick-Detach mechanism, a precision telescoping clamp with world class return-to-zero, and a CNC milled base with the industry's highest strength-to-weight ratio, all while being as low-profile as a fixed bolt-on mount.
In 2015, the second generation Low Drag Mount became the first Quick-Detach mount ever to be CNC milled from 7075-T6. Its external edges were rounded to minimize stress risers, the thumbscrew was Black Nitrided, and a pair of integral shear lugs was added to the clamp to further improve lateral impact resistance.
Today, the Leap mount features an even stronger base with a forward lean to provide more room for magnifiers, and chamfered side pockets for improved thumbscrew access. The re-designed clamp has discreet hardened steel pins and a stopper to indicate when it's sufficiently open to clear a Picatinny rail.